Joost Elffers, author portrait

Joost Elffers

Joost Elffers is the producer and packaging genius behind several bestsellers including The 48 Laws of Power and The Art of Seduction (by Robert Greene), The Secret Language of Birthdays (with Gary Goldschneider), and the Play With Your Food series, among others.  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

Relationship Advice Needed!

In April, online retailers see significant spikes for searches about relationships and marriage, such as “relationship books, marriage workbooks for couples, marriage books, marriage counseling books, sex books for married couples, books for couples”. The pandemic has surely impacted relationships, and this year’s sales are trending up.

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