I skimmed through the book it looks quite comprehensive and well-written. Usually books/guides about microcontrollers get lost in the details of interfacing myriad sensors and actuators without going sufficiently deep in how they actually work.

Although I personally favor Atmel's MCUs, perhaps no one can deny Microchip's (the maker of the PIC line of MCUs) wealth of documentation and application notes [1] which could serve as additional material to refer to for some pretty handy tips and guides.

[1] www.microchip.com/applicationnotes/