The tube delusion

I had a peculiar encounter this morning on the Jubilee line. I luckily conquered a seat and flung out my usual morning reading - this time Dawkin's The God Delusion. Seconds later people on the opposite side of the carriage started smirking and almost couldn't hold their laughter. I started looking around, examining myself (one never knows, there might be toilet paper hanging out of your jeans), and only when I saw what my neighbor passenger was fiercely studying (plenty of many coloured bookmarks), it all made sense - he read a bible.