A sensational invention by Professor Calculus begins by causing havoc at Marlinspike Hall: every window shatters, along with most of the glassware in the house! Sadly, this discovery won't be landing on the joke-shop shelves. Spies set out to seize Calculus and prise his plans out of him. It turns out the kidnappers are Bordurians, the eternal enemies of the Syldavians, and they are quite determined to turn Calculus's invention into a weapon of mass destruction.
Hardcover
