This book is very, VERY informative about various aspects of a proposed space elevator. That is both its virtue and its defect.
Most of it is essays on various aspects of the concept, and how they will/could be addressed. Cool.
However, while many of these essays were engagingly written for a lay readership- many were very much not. They were full of data, but extremely dry and lacking in the context that this lay reader would have needed to comprehend them properly.
And while the blurb i read said it was a mixture of fiction and essays... well, that's sort-of true. The problem is the original fiction is mostly not all that engaging; the best of the fiction was reprints from Golden Age authors.
But returning to the essays- it seems to me that there is a contradiction- not addressed- between (for example) the greater efficiency of the space elevator and its lack of pollution compared to rockets... and other essays that claim that the space elevator will only increase the market for rockets (and thus provide more pollution from these rockets). This is the kind of speculation I'd want in such a speculative tome... but it's frustrating that the contradictions were not ever addressed.
IF- and only if- you are a serious space elevator fan- I'd recommend this. However, it is very much not for the casual reader, despite a few individually great essays.