OK, if you want to be pedantic, this is from the back cover of 'Roadcraft' Motorcycle Roadcraft has been developed under the guidance of a group of police motorcycle trainers, with input from police riders, trainees and civilian experts, and is for police trainees and other riders concerned with getting the best from their machines. and if you want more, inside in the acknowledgements, - This edition of Motorcycle Roadcraft was initiated by the Police Foundation at the request of the Association of Chief Police Officers. It was produced by the National Police Driving Schools' Conference Motorcycle Roadcraft Working Party in conjunction with the Police Foundation and the National Extension College So you're right, it wasn't 'wrote' by a copper, just loads of them