Digital Forgeworld Books Begin: The Horus Heresy Mechanicum: Taghmata Army List
Forgeworld books not quite what you want to carry around with you for your army? Now the Black Library is printing them digitally. I personally like the books myself, but at the same time always think twice about taking any with me, this solves that.
The Black Library now carries the digital version in a Tablet Edition
http://www.blacklibrary.com/all-products/HH-taghmata-army-
Tablet Edition:$ 34.99