Companions: Fifty Years of Doctor Who Assistants is an unofficial guide to the travels and experiences of the companions of each of the eleven incarnations of the Doctor. Written by a true fan, Andy Frankham-Allen provides an in-depth account of each character's struggles, experiences and relationships as he outlines their significance in the TV series as well as other Doctor Who media.The book also features a foreword by Gary Russell and afterword by David J Howe.