Capt. W.E. Johns 
Biggles Fails to Return [EPUB ebook] 

Biggles is sent on a secret mission to Monaco to fetch an Italian princess but fails to return. Biggles is missing. Last seen lying shot and bleeding, surrounded by the enemy, his chances of survival are not good. But Algy, Ginger and Bertie will not give up until they find him, dead or alive, and if that means entering Second World War enemy territory then that’s what they’ll do…