As a young (under 30) man looking to "return" to the catholic faith after a 20+ year absence, I found this book essential on my personal quest. It may seem to oversimplify everything it talks about, and it does. But it serves as a real down and dirty quickie guide on eveything catholic. Eveything is boiled down to a quick 1 1/2 to 2 1/2 page (pages are 4" square) Each point of the 101 points is readable on it's own, but they flow from one to another quite smoothly. I read it the first time as a book, but will keep it around as a quick reference.
There were many things I had questions that were not really impoortant to my decision ( like why catholics eat fish on fridays) I did not really need a long discourse on the reasons, I was just curious, and the quick page-and-a-half passage on it in this book was perfect. Other things, like the reconcilliation between faith and science, (a biggie for me...) filled a few passages, amd was maybe 6-8 pages. It served as a wonderful jumping off point to open the discussion with the priest I am working with.

If you are a catholic, you really need this little book around.