It's based on an average, so you can read three books one day and then sleep for 48 hours. Everything counts, even picture books, which is handy since I just finished off the Cybils Nonfiction Picture books. I hope they help me out on the driving days.
This week kicks off the Summer Solstice (June 21st), so the books so far are:
June 21: Lord Peter Views the Body, Dorothy Sayers (audio), library
June 22: Mrs. Harkness and the Panda, Alicia Potter, (PB), library
June 23: Smells Like Dog, Suzanne Selfors, (kidlit), library