What are your babies sleeping like?

kris
My guy is just over 9 weeks and goes to bed around 930, sleeps for 45 minutes and then we fight for over an hour to get him to go back to sleep. Then he sleeps for 4 hour stretches until 10am. I don't understand this 45 minute nap at the beginning of the night but it happens EVERY SINGLE NIGHT! 
When do yours wake up in the AM? How often do they wake at night to feed? How old  is yours?
What's worked for better sleep habits and what hasn't? Any good books on this? My guy struggles with naps and I'm convinced if we slept better at night, our naps wouldn't be so chaotic.