The “top ten” articles are drawn from past issues of BAR and are accompanied by a number of illustrations (both B&W and color). Some of these illustrations are better than others, I presume that the better photographs are from more recent articles (such as the Tel Dan inscription). The book is 148 pages, each article is 10-12 pages long. In a few cases, the original sidebars are also included. Since the articles are from the BAR magazine, they are written for the non-specialist. (This book looks alot like the older “Best of BAR” series.)
As for the list of Top Ten archaeological discoveries, it is mixed list. The Nag Hammadi library is first on the list, a worthy inclusion. But the book omits the Dead Sea Scrolls. At first I thought this was because the discoveries were all after 1974 (when the Biblical Archaeological Society was founded), but the Nag Hammadi library was discovered in 1945, the same time as the Dead Sea Scrolls. I think that the mosaic from Sepphoris on the cover of the book is beautiful, but I am not sure it rates the top ten.
For the cost of your email address, this is good book to download. Everyone will disagree with about any “top ten” list, at least this one is free.