It begun simply because a sudden strange fancy .

Polly Perks had to become a boy in a hurry. Slicing off her locks and wearing trousers was easy. Understanding how to fart and belch in public areas and walk as an ape had taken more time . . .

And today she’s enlisted in the army, and searching for her lost sibling.

But there’s a war on. There’s always a battle on. And Polly and her fellow recruits are suddenly in the thick of it, without the training, as well as the enemy is definitely hunting them.

All they possess on their side is the most artful sergeant in the army and a vampire with a lust for coffee. Well . . . they have the trick. And because they consider the war to the heart from the enemy, they need to use all of the sources of . . . the Monstrous Regiment.