Instruct: Classify Amazon reviews into positive or negative sentiment
Query: unless you're really, really serious

This is an excellent coverage of single pawn minor piece endings because it's exhaustive. The explanations can be difficult: this should not be the first, second or even third endings book you take on! But if you simply enjoy the fundamental chess endings and have been through most of them already, then this has a lot in it for you. Nunn's explanations, although they can be difficult, really are helpful.