Ack-Ack Macaque

This series follows a cynical, one-eyed, cigar-chomping monkey codenamed 'Ack-Ack Macaque' who pilots a nuclear-powered Zeppelin in a world where Britain and France merged. The books feature a blend of World War II-era espionage, futuristic technology, and interdimensional threats, with the protagonist repeatedly drawn into saving the world from various dangers.