Intrepid Singaporean cinematographer Pok Yue Weng compiled 46 cafes in a fevered pursuit to document Japanese cafe culture. I have not read the book but you cannot go wrong with 46 cafe reviews. Imagine the sheer amount of coffee he imbibed! His life-risking feat is worth your support so get the book here:
Find out more from the Tokyo Cafe Facebook page:
Update 20 June 2014:
A friend bought the book at BooksActually and gave me a copy as a gift. The chapters are categorized by different Tokyo wards and bookended by maps thoughtfully segregated by zones. A must-read regardless whether you are a caffeine fiend or not.