This is a very disappointing book, both in pictures and words.
The book is essentially a (mostly) pictorial guide to a number of unusual themed restaurants in and around Tokyo, several of which I've been to. While the book may be good to give you a general idea of places, it falls somewhere between a guidebook and a set of travel articles, and doesn't really succed as either. The text often contains personal anecdotes that may be colourful but don't give you too much of an idea about the restaurant itself, and the sort of food it serves.
The photographs are mostly poor quality and look like personal "happy snaps". Most are closeup, often poorly lit photos of food or faces that don't give a good idea of the overall atmosphere of the restaurant. Okay, many of the restaurants are dark but maybe if the author had at least approached them for some publicity shots they would have been happy to help out. Even the cover photograph is a poor quality reproduction and it looks like someone has decided to add some stickers on the front to disguise the fact that it's grainy and blurry.
On the plus side, the book contains useful information that you can use if you want to visit yourself, such as opening hours, phone number for reservations, website and street address (although a small map would have been good given Japan's sometimes confusing address system). It would also have been good to know whether non-Japanese speakers are well catered for in any of these restaurants. I would suggest using this book as an introduction to the subject but if you think you might be interested in going, I'd do a bit more research.