Move over mockingbirds and watchmen. There's a new Yent in a tent in town. Dr. Seuss' new book, "What Pet Should I Get?", features the same siblings seen in his 1960 classic "One Fish Two Fish Red Fish Blue Fish." The book went on sale Tuesday, two weeks after the release of Harper Lee's long-awaited second novel, "Go Set a Watchman." But unlike some fans of Lee's 1960 book, "To Kill a Mockingbird," those who love Dr. Seuss are unlikely to be disappointed