This is the perfect introduction to chess for children from the age of seven upwards The book contains 30 short lessons starting with learning about the board & the pieces then the moves of each piece in turn then the vital concepts of check checkmate & stalemate & finally basic strategy & thinking skills Quizzes & puzzles reinforce what the children learn The book uses the characters of the 7-year-old twins Sam & Alice who are always arguing & fighting They decide to join the army where they are told about an impending invasion of aliens from the planet Caissa The outcome of the invasion will be decided by a game of living chess During their lessons they learn about the battlefield & the different types of soldier & get to play the part of each in turn