Reddit mentions of Practical Endgame Play - Beyond the Basics: The definitive guide to the endgames that really matter (Everyman Chess)

Mueller and Pajeken's How to Play Chess Endgames for under $10 USD in the Kindle edition:

https://www.amazon.com/Play-Chess-Endgames-Karsten-M%C3%BCller-ebook/dp/B00JKR7DKO

The above can be considered the chess endgame strategy followup to Mueller and Lamprecht's Fundamental Chess Endings, also for under $10 USD in the Kindle format:

https://www.amazon.com/Fundamental-Chess-Endings-M%C3%BCller-Karsten-ebook/dp/B00BJ64LMW/ref=pd_sim_351_1?_encoding=UTF8&psc=1&refRID=MAV2EHEBWJ3GWDHBN3WM

Alternatively for more complicated endgames, you can study them broken down into every combination of two or fewer pieces in Glenn Flear's Practical Endgame Play:

https://www.amazon.com/Practical-Endgame-Play-Definitive-Endgames/dp/1857445554/ref=sr_1_1?ie=UTF8&qid=1505233193&sr=8-1&keywords=Glenn+Flear

Practical Endgame Play - beyond the basics by Glenn Flear.

Some quick points. This endgame happens about 1.3% of the time in GM play. The two bishops usually have the advantage against B=N, especially in open positions. The side with the two bishops also has excellent drawing chances if in an inferior position, as you can fairly often trade down to an opposite colored bishop ending.

See this game for an example:
http://www.365chess.com/view_game.php?g=2432170