Problem with any book is standards, or the lack thereof. They go out of date so fast, and so many hobs/brakes/etc are so different that Youtube and/or manufacturer websites are your best bet.
Mavis do lovely clear, concise videos on hub maintenance, for example.
[video]http://www.youtube.com/watch?v=31i0XWJpI4Y[/video]
Equally good, but in a different way, are Hope’s ones, delivered in a thick, no-nonsense accent by this likeable chap
[video]http://www.youtube.com/watch?v=UAqAanDsAKA[/video]
Better than any book. SRAM do good Tech videos too, and the PinkBike Tech Tuesdays are usually good too.