New York, NY: Macmillan (June 2, 2026)

Hardback. Signed.

New.

Multiple-time New York Times–bestselling sewer surfing super-sleuths Mango & Brash are back in the ninth volume of the mega-smash-hit InvestiGators series!

The InvestiGators’ latest case is a dairy disaster! The city's water supply has been replaced with milk and the newest feline agents, the InvestiGators, don’t seem to be complaining. What’s with the simian scientists and why is the rain green?! All will be revealed in this sticky volume of InvestiGators! Also includes Spanish dialogue and a special appearance by Daryl the daffodile.

John Patrick Green is a human with the human job of making books about animals with human jobs, notably the smash-hit graphic novel series InvestiGators. John is definitely a multiple New York Times-bestselling human author and not just a bunch of animals in a trench coat pretending to have a human job. With over three million copies of InvestiGators in print, John is a successful human being with only two hands and a normal amount of fur. He lives in a Brooklyn apartment that doesn't allow animals other than the ones living in his head.