My wife wanted me to mention a book that we came across a while back. Even though my wife comes from a spiritual background and I from a scientific background, we both found it an interesting read.
Doreen Virtue has written many books on the subject of numbers. I found it interesting and upbeat. It also touches on many other numbers and gives a different perspective if your coming from the religious side of things. PS: she says nothing about the end of the world when it comes to the number 44.