This month's free ebook is "For the Love of it: Amateuring and Its Rivals" by amateur cellist, Wayne C. Booth -
http://press.uchicago.edu/books/freeEbook.html According to the description, "... It is a story not only of one intimate struggle between a man and his cello, but also of the larger struggle between a society obsessed with success and individuals who choose challenging hobbies that yield no payoff except the love of it". The ebook is in pdf format.