After you’ve read 1 or 8 books on baby sleep you may be rightfully confused about why your 8 month+ baby is not sleeping through the night. And while I’ll admit that there are a few reasons why this may be happening 99% of the time there is one single reason why older babies, toddlers, and even preschool kids are still waking up multiple times each night. If you’re ready to sleep through the night you need to understand why they’re waking up and what to do about it.