Fuel cells is a very difficult topic to write about because of the interdisciplinary nature of the subject. I am using the book to learn about Fuel Cells myself and my feelings are mixed. While this book is an excellent starting point, there are some over simplifications and errors. As a Mechanical engineer, some descriptions in the text made me cringe. Watch out for errors in some equations.
Excellent resource for someone with a technical background and general interest in fuel cells. For more serious users, recommend using in conjunction with maybe the DOE fuel cell handbook available from NETL or from OSTI.GOV