I have some e-books that I've downloaded from Project Gutenberg and some other sources to my MBP. They are all DRM free. Excluding e-mail them to my Kindle as a personal document as a method (the total size is more than 5 GB, the space provided by Amazon), is there any way to transfer these books to my Kindle App on my Nexus 7 (Android Tablet). I have the Kindle App version 3.1.7
I've already seen the question Can I sync books I didn't buy from Amazon via Kindle app? but that is not the answer I'm looking for.