As a big fan of Baby 411, I recently bought Toddler 411 and am equally as happy. Though if you’re having sleep problems with you child, sleep is covered in full in Baby 411, so I’d suggest getting that one, or going to the library/bookstore and reading that chapter. The sleep advice in these books has been priceless. Our 15 month year old sleeps 12-14 hours a night and all we do to put her to sleep is read books and then put her in her crib (wide awake) and kiss her goodnight and tell her we love her. I don’t know where we’d be if I didn’t follow the advice in these great books.