I have Four Steps to the Epiphany and I hate its design (awkward size) and typography (the lines are too long!). It would look much better on my Kindle for sure.

Doubly ironic since I love to have reference books with me in Kindle format on my iPad - searchable, scannable (highlighted sections can be compressed together, and always with me). My paper books languish at home. With multiple offices and an apartment I don't, and I suspect this is relatively common, have "a" bookshelf.