6 and a half month old & sleep

Does anyone have any tips for a 6 and a half month old who just won’t sleep these days?! Does reading a book really make a baby sleepy (I always see on the internet reading a book as part of a baby’s sleep time routine).

Any simple routine to follow? And do you implement the same routine every nap of the day? Our biggest struggle is our daughters midday night and nighttime sleep. Any advice would be amazing