Fiendish Angletron (Murderous Maths S.) -- Paperback

For readers traumatised by triangles and anxious about angles, the next in the unchallenged Murderous Maths series, The Fiendish Angletron, unveils the tools to solve the most testing of trigonomogeometric tasks. Using a host of hilarious characters, Kjartan Poskitt presents all the tricks, tips and shortcuts to angles they don't teach at school