Al-Anon's World Service Office offers several CAL books in electronic form. You can download them to a phone (or tablet or laptop) and have them with you wherever you go. They are available from multiple sources including Amazon, Itunes, Google Play, and Barnes & Noble. For example, the Courage to Change download on Amazon (Kindle version) costs $9.99.
Here's the link to the W.S.O. page: ElectronicBooks
