200 Endgame Problems by Shirai Haruhiko. Long out of print, this popular collection of problems covers common situations from simple endgame tesuji to complex issues that require careful reading and counting.
AlphaGo vs Lee Sedol: The Match that Changed the World of Go by Yuan Zhou. In a detailed commentary of the five game match between Lee Sedol and AlphaGo, Zhou explains why Lee should not have won the fourth game but should have won the fifth while also discussing the strengths and possible weaknesses of AlphaGo.
The Young Chinese Go Masters, Volume One by Yuan Zhou. Zhou analyzes four games involving eight of the young Chinese pros who are dominating the world of go.
Single Digit Kyu Game Commentaries by Yuan Zhou. Zhou thoroughly investigates a variety of mistakes that are common among weaker players, and illustrates how to deal with many common situations correctly.