You asked for a book similar to Pyro by Earl Emerson, and mentioned that you
also like Wambaugh's Fire Lover and Picciotto's Last Man Down. Here are
a few suggestions, both fiction and nonfiction, featuring firefighters:
Fiction:
Emerson has written quite a few books featuring firefighters, including
a series about a female ex-firefighter and arson investigator, Mac
Fontana, such as Morons and Madmen, Going Crazy in Public, and The Dead
Horse Paint Company. But, one of his books with a male firefighting