Sleep training books?

Lauren • Mama to Jacob 1/25/19💙 and Connor 2/3/22💙. Mom to my fur babies 🐶🐱teacher..lover of reading 📚

Are there any sleep training books fellow moms recommend?

My almost 6 month old is still waking up 2-3/4 times a night and takes terrible naps. I need help! Lol

Any input is appreciated! 😊