
So when I heard about World-Building by Stephen L Gillett, I poked around and did my research before going any further. I discovered that the book is several decades old and, yes, I even found a writer complaining that the book was too elementary for her.
In fact, she said, "as a writer whose already put out one title and has another written, I think I have a lot of experience fleshing out a story than most people who are just starting out" and eventually gave the book a three star review.
Generally speaking, that's a warning flag. But as someone who wants to write good sci-fi and often feels way out of their depth with some of the world building elements, I decided I would give it a shot.
After reading each of its 175 pages of content (not including the tables and sources compiled at the end), I have to say that was a really good decision. See, the book isn't about world-building in the sense that a lot of people use it, but rather it is about the actual, literal process of designing a planet.
Perhaps that gives you the first hint if this is the sci-fi book you're looking for. Is your book set on earth, but in a dystopic future? This book is not for you.
I'm not sure what elements the author I previously quoted learned while writing her novel set in Victorian England that would give her a leg-up on writers approaching this book. Perhaps the quality of Earth's star was a primary element of her story--I don't know.
But what I found in this book was not tips on how to "flesh out a story," but helpful equations dealing with geology, physics, and astronomical sciences. Chapters are dedicated to the implications a star can have on the worlds orbiting it or the effect a different degree of axial tilt will have on seasons.

If you are looking to design a realistic science-fiction universe, this might be helpful to you, but I doubt it will be the only book you will read on the subject. Other topics, like the biology and sociology of alien races or the ramifications of space travel, are covered in other books in this series, all of which are edited by sci-fi writer, Ben Bova.
And on the topic of the editing, I do have to comment that a better job could have been done. In the second chapter there are a number of mistakes in the facts given about the distances of planets and stuff along those lines, which do make me kind of doubt the other facts given within the book. So even the interesting things I have learned I will be sure to double-check before mentioning in a book of my own, which makes aspects of the book a hard sell.
However, over all I think the question of whether or not this book is worth your time depends entirely on what you are looking for within the book. If you have no plans of writing sci-fi on a different world, you will be disappointed by this book. It does not have fun tips for writing or even details on creating other races that might come in handy with other genres.
It is about exactly what the title says: building worlds.
If that does not interest you, or you take the stance that sci-fi is just fantasy in space, this book might not be for you. However, if you are looking to make sci-fi worlds that stand up against most scrutiny, then this book just might be for you.
What writing books have been the most helpful to you? Tell me in the comments. Who knows? Maybe they'll end up being reviewed here in the future.