Mimi and her little brother Joe think it’s too hot to do much of anything. They’ve spied on the “blah-blah ladies” (their mother and her visiting friends) and have eaten snow cones, but after that they’re not just hot – they’re hot and bored. They decide to head for the public library, where they’ll not only enjoy the air-conditioning but also find books to entertain themselves. Mimi heads for the princess books and Joe for the dinosaurs, and together they escape into cool fantasy worlds. R. Gregory Christie uses hot pinks and bright yellows to illustrate the hot city streets, and soothing blues and greens for the cool library interiors of Barbara Joosse’s story. (Ages 4–8)