With all the devices out there, Fires, nooks, Galaxies, etc, etc, in order to use them in the classroom, you need content. We reviewed, many a time, where to get said content. Places like search-ebooks.eu (http://www.k12opensourceclassroom.org/?p=1547), Project Gutenberg and Google Books (http://www.k12opensourceclassroom.org/?p=969), and audiobooks on LibriVox (http://www.k12opensourceclassroom.org/?p=273).
What about textbooks though? We recently came across bookboon where you CAN download free eTexts. At first glance at their site, it appears like you will find quite a large selection as well. Across a variety of subjects like IT, Programming & Web, Finance, Geoscience, Mathematics, Marketing & Media, and even Nanotechnology. When you find one you like, you go to download it and follow 5 simple steps. The hook is they want you to sign up for their newsletter, but hey, use a disposable email, and you’re set. They ask if you are studying or working, your study program, university, then you download the book. It appears like they are all in .pdf format which can be read on just about all devices these days. For free, you cannot beat this, and looking at the quality, it appears you will be pleased!