My five-and-a-half-year-old son has fallen in love with the "Magic Treehouse" books, and I do admire them, but after dozens of bedtimes spent in their company, Jack and Annie were starting to get on my nerves. (Does Jack always have to push his glasses up before he takes action? Does Annie always have to befriend the weak and the downtrodden, and wake up so much earlier than Jack?) Rather than discuss these complaints with my son, I decided it was time for us to refresh his bookshelves. My d...