Does anyone know of a good book about baby sleep. My son is 14 months old and doesnt sleep through…

Does anyone know of a good book about baby sleep. My son is 14 months old and doesnt sleep through not at all. Most hes woke up is 4 times, least is 1. I prefer not to do the cry it out method.ive also heard of a lula doll, that its supposed to simulate the baby sleeping with someone. So if anyone has a book recommendation id greatly appreciate it. Or if anyone has gotten a lula doll for their LO id like to know how it worked. Thank you in advance.