D....! I bought this book, lost money. A lot of errors covered under lots of colour, e.g. one page for one graphic about Agrobacterium-infection, guess what's missing. Another one: look at the F0/F1-ATPases, there is no proton-flow through the head, this is known for years, an essential fact, even for an under- graduate course! Also the chapters about genetics and signal transduction: incomplete, poor graphics, but a lot of nice colours again. These "small" errors sum up. In my opinion it's impossible today to write a comprehensive text book which covers all topics about microbiology, an undergraduate should first learn how a prokaryotic cell works, it is impossible to learn it with this book. Then I stopped reading, for the good section about systematics it receives at last three stars, otherwise it would have been two.