Scott Kelby's book details all the features of the software very didactic way and of course, in the relaxed style of the author. It saves a lot of time getting started. If the file management part is virtually identical to the book on LR3, LR4 new sliders are well explained and examples abound to describe what they do and when and how to use them (or not!). A useful part is devoted to catching up with faults pictures (overexposed poor lighting, etc ...).
The chapter devoted to printing images is also well detailed and avoids the disappointment of the beautiful picture on the screen and some on paper.
Between each chapter, we are treated to a dozen handy tips and tricks that make it possible either to take racccourcis or to do things that the software is not supposed to do.
the only downside is that the screenshots are a little too small and we have to look meadows to view the position of sliders.