Ebook: Abkhaz - A Comprehensive Self-Tutor

As the title says, a comprehensive textbook for Abkhaz. Based off the Abzhywa dialect, which is the literary dialect. Written to be used alone.
But this book is not for the faint of heart. This is a hard language (unless you happen to already speak another NE Caucasian language) and this textbook does not try to protect the learner from its difficulty.
This book would greatly benefit with audio. I'm not sure if any was made.