Mo Willems isn't the only "Sesame Street" alumnus writing books for children, of course. Norman Stiles, former head writer for the PBS show, has penned On My Very First School Day I Met... Stiles, whose wife teaches kindergarten in Manhattan, told USA Today's Bob Minzesheimer, "I wanted to do a joyful book that was fun and would relieve the tension [of the first day of school], if there was any, and open discussions with parents."
The USA Today article suggests other books for soon-to-be kindergarteners, too. My advice? Choose one carefully, and don't get carried away. (I say that because I am always getting carried away.) I regret reading any book to Junior before his first dental appointment when he was three. The dentist was so cool, with magic tricks, a trinket machine, and so on, that you'd barely know that he had examined Junior's teeth. One of the books (which I should have previewed before reading aloud) featured a kid who ran off down the street rather than going to the dentist.