this is one of the book everyone with atmel's microcontrollers should have!!! this book clearly explains each and every inch of atmel ATMega series especially Atmel ATMega16 the architecture is exactly what everyone is supposed to know before they do any programming thats so clearly explained with examples and the real time programming is always done in c language rather than in assembly so someone who is really interested to do magic with microcontrollers its a must buy book!!!