Better Chess Now Series 20/20 Calculation by G.M. Daniel King
It's a common problem. You plunge into a maze of variations, lose your way, see your time disappearing, then choose the first move that comes into your head - a recipe for disaster! There's got to be a better way - and Danny King is here to let you into the secrets of 20:20 calculation, helping you to cut through the fog and home in on what's crucial.
Vol. 2 Features the Pseudo-Tromp, Fried Liver and Laskers Defence in the QGD.