Okay, how about this...since it looks like most of us have the book:

Chapters 1-5       August 12-18
Chapters 6-10    August 19-25
Chapters 11-15  August 26-September 1
Chapters 16-21  September 2-8

Does this sound doable? 

Reply here when you've received you book and we can get a schedule together.  It's a pretty quick read, so this one won't take long either.