Penguin Random House, author portrait placeholder image

Joost Elffers

Joost Elffers is the packaging genius behind Viking Studio's Secret Language series, Play with Your Food, and How Are You Peeling?. He lives in New York City.
The Secret Language of Relationships
The Secret Language of Birthdays
The Secret Language of Birthdays: Teen Edition
The 33 Strategies of War
The Secret Language of Destiny

Books

The Secret Language of Relationships
The Secret Language of Birthdays
The Secret Language of Birthdays: Teen Edition
The 33 Strategies of War
The Secret Language of Destiny