Sorry, no book recommendations...
I think our dd is like a lot of kids here: Did not sleep throughout the night until 3 (when something in sleep changes naturally). However, since then she sleeps better than most kids her age, who were sleep trained... hardly ever has nightmares, does not fight sleep, etc.
I am very happy that we have always listened to her and tried our best to respond to her needs. However, there were some tough times, when she did not sleep well as a baby/toddler. I was really tired for a long time.
Mama to a little lady and always praying for more.