14 months is a tough age - from memory that's about the time that they are transitioning from 2 days sleeps to 1, which makes every day unpredictable. Now is probably a good time to start aiming for one nap a day. I find lunchtime works best - say 12ish if he can last that long, otherwise they get too tired again at the end of the day. See how you go introducing that as a routine - it works best to go out in the morning - shopping or park - or some play at home that wears him out a bit. Then have lunch, story and bed. Good luck with it.