I don't travel much, and seldom need LOTS of reading matter while on infrequent trips...but if I think I will, I have a smallish notebook PC. On it I have a couple of 'reader programs' which emulate a book. I can put ANY text.... in several different formats... on the Notebook and read in almost any font or font size. Since many people carry notebooks anyway on trips, why not use them? Smaller can be nice and convenient, but hey... a notebook was once considered convenient. I really like seeing a virtual book which is about the size of a real book.

Here are two programs which emulate books.. I use the 2nd one 'more'. And I have two others which I have just not played with much.

http://www.spacejock.com/yBook.html

http://www.fellnersoft.at/eTR.htm