I was really surprised by this book. For how small it is, it covers more than I thought it would. It focuses on 5 areas. 1-Abu Dhabi and 4 areas/regions in Dubai. Detailed maps are provided for all (The fold out map is a bit awkward but there are also several mini maps throughout the book with marked numbers of the places/sites you are reading about.
The "10" is on account of the frequent lists given throughout the guide in groups of 10. It is not overly detailed but gives you many options to consider visiting or seeing without having to wade through a lot of extrenuous information to get to the nitty-gritty and, typical of DK publications, they are not skimpy on the amount of color photographs (although it is a small guide book, made that way for ease of portability, so some of the photos will naturally be quite small).
It is not going to have extensive detail on the history of Dubai or the UAE nor on all of the customs and traditions of the people. For those who will be visting Dubai for a long time, going there more than once, or consider relocating, this book along with Lonley Planet's "Dubai City Guide" and Culture Smart's "The essential guide to customs and culture of UAE" make a great trio.