From the reviews of the first edition:
"This book serves as a Coq user manual, supporting both beginners and experts in the use of Coq and its underlying theory. Numerous exercises further enhance the utility as a learning aid. A supporting website provides downloadable source for all the examples and solutions to the exercises. As an introduction to Coq the book is self-contained . The book is also comprehensive . In summary, the book is an essential companion for every Coq user ." (Valentin F. Goranko, Zentralblatt MATH, Vol. 1069, 2005)