This book is an absolute hidden gem. It doesn't make it onto too many "C++ must read" lists, but I would rate it at least as highly as the more well known Meyers and Sutter books, amongst many. Although C++ FAQs runs to nearly 600 pages, it is broken down into the now-standard format for faq lists: short to-the-point topics, grouped into common subject areas. I counted 428 separate questions, in 39 chapters. Thus each point is necessarily short and therefore easy to digest, a fact which is helped by the author's conversational style and easy-to-follow examples.
Apart from dissecting the core language itself, other chapters include discussions of the management and design perspectives; OO fundamentals; testing strategies; and COM/CORBA, which you would not necessarily expect in a book on pure C++ programming.
When looking up particular questions in this book, I often find myself distracted by other questions (the table of contents is 25 pages!) which lead me down interesting and informative tangents. This only serves to increase my general level of knowledge and understanding of C++.
Combine C++ FAQs with the classic Stroustrup text and a good STL book, and you have an excellent core C++ reference set.
Highly, highly recommended book.