Once so I could say I did.
A second time because I was a born again Christian at the time, it was the word of God, and the answer to everything.
A third time because it's a fantastic book. Love, war, sex, betrayal, real life super heroes, etc. Honestly, whether you believe in God or not (which I'd like to make perfectly I do, but am not Christian), it is most likely the best book that will ever be written; and I still read from it a few times a month.