This is my second child but I am still struggling with figuring out the night wakings

DS is 10.5 months and eats very well during teh day. He gets his night bottlw at 8.30pm/9pm and doesnt need another bottle until 5pm. Thats like 8 hours but he will still wake up several times in between. I will have to put him back to sleep by holding him or co-cleeping and patting him. His day time naps are messed up(inlaws have been watching him so they can only so so much).

My husband gets a week off next week and said he will do the sleep training. Definitely not doing the cry it out method? Which sleep book do I reference..?