The mysterious disappearance of the young engineer responsible for the machine which makes tunnels for underground railways turns into one o f the most hair-raising cases in the career of private investigator Fe rmín Escartín. Escartín, ex-university lecturer turned detective, has already appeared in other novels of Fernando Lalana, but none of them as disturbing as The Tunnel - Driller, which combines irony, terror a nd mystery all the way through the book.