Divine inspiration

I have been racking my brains for last few days as what should be the theme for my 800th blip...this morning I had a lightbulb moment whilst dusting the book case at my morning job. There was a copy of one of my all time favourite books sat there on the shelf :-) and I new for a fact that it had more than 800 pages :-). Can you guess which book it is Sis & TJ :-) . For others will post the front cover for 801 blip :-)