Stefan Priebsch has posted a book review of Packt Publishing's "Mastering phpMyAdmin" (by Marc Delisle of the phpMyAdmin team).
Kshipra Singh of Packt Publishing was kind enough to send me a copy of Mastering phpMyAdmin 2.11 For Effective MySQL Management to review. The author is Marc Delisle, phpMyAdmin developer and one of the project administrators since 2001. You probably can't get a better author for that kind of book.
Stefan talks about a few of the chapters - the introductory material, one on exporting database structure and data, a look at the relational system and a look at bookmarks (a way of storing statements for later use). He does recommend the book, though, noting that it's crammed with enough information to make it worth the price.