Rating: 
Summary: Already owned 90% of it, but couldn't resist
Review: As a collection of his works, this is by definition typical Niven. His work is often an intellectual exploration of the practical implications of playing with some stock science-fiction concepts. Sometimes these are technological innovations, sometimes they are quirky but realistic aspects of physics. Always they are presented in intelligent and engaging ways, and always with a sense of fun.It's amazing how well this style crosses over into the few works of fantasy he has created, some of which are included here. Again, we see the meticulous but effortless presentation of a very firm set of rules by which magic is allowed to operate, and then he has a ball exploring the dynamics of the system he has put in place. There are no pretentious profundities in Niven's work. His writing concentrates on what he loves the most - the intellectual game of playing with an idea. As with some other good science fiction, this implies that characters sometimes take a back seat. This is particularly the case in his older and shorter works, obviously, and this collection perforce contains a preponderance of those. An intelligent author who clearly loves science and astrophysics, and is educated enough to use them to his advantage in surprising but entirely believable ways.
Rating:
Summary: Already owned 90% of it, but couldn't resist
Review: As a collection of his works, this is by definition typical Niven. His work is often an intellectual exploration of the practical implications of playing with some stock science-fiction concepts. Sometimes these are technological innovations, sometimes they are quirky but realistic aspects of physics. Always they are presented in intelligent and engaging ways, and always with a sense of fun. It's amazing how well this style crosses over into the few works of fantasy he has created, some of which are included here. Again, we see the meticulous but effortless presentation of a very firm set of rules by which magic is allowed to operate, and then he has a ball exploring the dynamics of the system he has put in place. There are no pretentious profundities in Niven's work. His writing concentrates on what he loves the most - the intellectual game of playing with an idea. As with some other good science fiction, this implies that characters sometimes take a back seat. This is particularly the case in his older and shorter works, obviously, and this collection perforce contains a preponderance of those. An intelligent author who clearly loves science and astrophysics, and is educated enough to use them to his advantage in surprising but entirely believable ways.
Rating: 
Summary: a puffed-up paen to an over-inflated ego
Review: It seems that most, if not all of Niven's lates works (post-1989) concentrate upon stock one dimensional characters, and an incredible amount of self-referential material. Worst of all, are his short introductions, in w hich he "modestly" refers to himself with ill-disguised admiration. His ego is apparently boundless.
Rating:
Summary: The best way to get to know a SciFi Great
Review: Larry Niven is one of the most inventive Scifi writers ever to live. His work is always brimming with ideas, from Ringworld --a million mile wide habitable ring around a star (a poor man's Dyson sphere) to Moties, a physiologically asymmetrical species made up of biological castes who each represent an aspect of intelligence (communicators, tool-users, decision-makers) or society. It is difficult if not impossible to find authors with more ingenious premises. Unfortunately, the narrative matrix these gems are embedded in, while often very good, is too-frequently merely average scifi. Plotlines and characters are often clunky, and clearly there simply to provide a setting for his brilliant ideas. Ideas that fit twenty pages are stretched to two hundred, or at best, patched together with other equally bright ideas that are not a perfect fit. The solution? A book of short stories and clips like Playgrounds of the Mind. This is a collection of the jewels, cut and polished. The selections are short very sweet. Long narratives, instead of being sacrificed for the purity of the premise, are dispensed with entirely. The ideas shine out on their own. Other recommendations: N-Space (another book of shorts), The Mote in God's Eye (with Pournelle; probably his best novel), Inferno (with Pournelle; personal favorite, but that's just me).
Rating:
Summary: The best way to get to know a SciFi Great
Review: Larry Niven is one of the most inventive Scifi writers ever to live. His work is always brimming with ideas, from Ringworld --a million mile wide habitable ring around a star (a poor man's Dyson sphere) to Moties, a physiologically asymmetrical species made up of biological castes who each represent an aspect of intelligence (communicators, tool-users, decision-makers) or society. It is difficult if not impossible to find authors with more ingenious premises. Unfortunately, the narrative matrix these gems are embedded in, while often very good, is too-frequently merely average scifi. Plotlines and characters are often clunky, and clearly there simply to provide a setting for his brilliant ideas. Ideas that fit twenty pages are stretched to two hundred, or at best, patched together with other equally bright ideas that are not a perfect fit. The solution? A book of short stories and clips like Playgrounds of the Mind. This is a collection of the jewels, cut and polished. The selections are short very sweet. Long narratives, instead of being sacrificed for the purity of the premise, are dispensed with entirely. The ideas shine out on their own. Other recommendations: N-Space (another book of shorts), The Mote in God's Eye (with Pournelle; probably his best novel), Inferno (with Pournelle; personal favorite, but that's just me).
Rating: 
Summary: A totally inessential compilation, much previously available
Review: Larry Niven's PLAYGROUNDS OF THE MIND is the second volume of various essays, short-stories, and various anecdotes from his 40 years in science-fiction circles. The first was N-SPACE. Some of the material in PLAYGROUNDS OF THE MIND is very interesting, such as his essay "Bigger than Worlds", in which he sketches out a number of interesting ideas for large-scale habitats, including his now famous Ringworld. His recipe for Irish coffee is sure to delight fans of the liquor. Nonetheless, the bulk of the selections in PLAYGROUNDS OF THE MIND do not make the book worth getting. Niven's non-Known Space material is infamously badly written. Many of the anecdotes about science-fiction conventions are dull, and will not entertain anyone who thinks the idea of a science-fiction gathering is somewhat silly. Furthermore, a great deal of the book consists of material available elsewhere. Chances are that, if you like Niven enough to buy PLAYGROUNDS OF THE MIND, you've already got all the Known Space books. And not only is the Known Space material available elsewhere, but what's in PLAYGROUNDS OF THE MIND is only the duds of the KS series, such as "The Soft Weapon" and "The Borderland of Sol". I'd recommend PLAYGROUNDS OF THE MIND only to those who have already read the majority of Niven's works and honestly enjoy his non-Known Space works.
Rating: 
Summary: Playing with Science Fiction
Review: Major asteroid impacts, the horrors of a computer virus,
Dyson spheres around a solar system, Ringworlds -
was all classic science fiction before it
was science and before it entered mainstream culture.
And in this book we get a peek into the mind of one
of science fictions best.
Thats all great, but don't look for new Niven
worlds in this book. Nevertheless, it is an ok
read and a must for Niven fans. -Simon
Rating:
Summary: A fun romp through Niven's head
Review: Most people who are reading this probably read N-Space and want to know if it's more of the same (which can be good or bad depending on what you thought of the last book) . . . basically it is more of the same, though the book "feels" different, don't ask me why. It's still the same mix of already seen short stories, rare short stories, excerpts from both longer works and works in progress and a bunch of essays on various topics. So a reader's reaction to it probably will be fairly personal depending on how well read one is with Niven. I've read a good majority of his novels and short story collections so the key point for me was the essays and the introductions to the stories themselves. Don't get me wrong, Niven is probably best with the short story and just about all of the stories here are worth reading again (there's also a bunch of stories set within the "Magic Goes Away" setting, all of which are great fun) . . . the excerpts aren't that interesting since most of them don't really give a good impression of the book but the notes about the writing of the novels make it more worthwhile. Niven is a lively writer when it comes to essays and the like, he often comes across as best fun and rather smug at the same time, like he's proud of himself and doesn't mind letting you know that. However, I can't blame him, if I was as successful as he has been in the SF field I'd probably toot my own horn more than could be considered healthy. He can afford it. Basically new readers will like this and the preceeding volume as a taste of what Niven can do, getting a glimpse of a lot of the high points that are lurking in his books (admittedly sometimes you have to look hard) while older readers can enjoy some longtime favorites and amuse ourselves with the many anecdotes and asides. A worthy purchase for any category of Niven fandom.
Rating:
Summary: The second half of "N-Space", from an SF master
Review: There is not much to say here that I have not already said in my review of the paperback edition of "N-Space". Especially since "N-Space" and "Playgrounds Of The Mind" really are the first and second part of one, huge collection, I highly recommend that you pick up "N-Space" first, or better yet, buy both books, but be sure to read "N-Space" first.
Rating:
Summary: The second half of "N-Space", from an SF master
Review: There is not much to say here that I have not already said in my review of the paperback edition of "N-Space". Especially since "N-Space" and "Playgrounds Of The Mind" really are the first and second part of one, huge collection, I highly recommend that you pick up "N-Space" first, or better yet, buy both books, but be sure to read "N-Space" first.
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