We have pretty much every Sandra Boynton book. They are fantastic. Plus a good number of them are songs and she has collaborated with tons of musicians to make them very special. Perfect Piggies [1] is a total ear worm and here is a song done by the Bacon Brothers [2].
While we do ready The Going to Bed Book every.single.night, I think my favorite is Snuggle Puppy - A Little Love Song [3]. I read it a little different than how that video is, but its really sweet and pure.