The Arson Murders is the third book in the William Barronson series. This time, William investigates a series of fires that are being set for either insurance or blackmail. As he starts his investigation, German agent, Carl Muller reappears. His mission is to get Barronson to return with him to Germany to be experimented on. If Barronson refuses, Muller threatens to kill members of his family. With these two problems William also struggles to control an injected serum that probably should have killed him. The greatest mystery of all is who is behind The Arson Murders in this thrilling mystery novel.