TOPNOTCH CHEMISTRY GURU is a peerless revision book well-tailored for effective preparation of KCSE candidates in Chemistry. It is a class apart in that: -Objective guided test revision test items. -At the start of every question/topic the authors have used the concept mapping by using the octopus technique in which all concepts in each topic are inextricably intertwined to make revision easier. -The questions cover all the Bloom's Taxonomy of assessment levels.