The best place to start your tactics training is in the endgame! Since most of the pieces have
left the board endgame tactics have the clarity that enables you to focus on what is
important. In 1001 Chess Endgame Exercises for Beginners IM Thomas Willemze does two things at
once. He explains all the basic concepts and provides you with a huge amount of exercises for
each theme and each chess piece in a highly instructive puzzle rush.