Most popular author in Poland

Both according to the National Survey and Nielsen Book Scan

Over 4 million books sold

In a country, where the average sales amounts to 4,000 copies

Rights to 6 series have been bought

Both by Polish and international TV networks

TV series based on his books

Made the TV network leader in it’s timeslot and broke record on Polish VOD

Rights sold to several countries already

Such as Germany, Italy, Japan, China, Czech Republic, Hungary and more

Winner of several accolades

First writer to receive two nominations at the International Crime Festival

Each new book becomes No. 1 bestseller

And stays on the top for several months

Dubbed as master of crime and suspense

Often compared to Stephen King and Alfred Hitchcock

Holds PhD in law

But gave up the attorney career just before the debut

Ambassador of the social campaign

“I love and I respect” aimed at ending violence against women

International praise

Tess Gerritsen

First it was Stieg Larsson, then Jo Nesbø, and now it’s time for another sensational crime author to invade our shores. Mróz introduces a hot new wave of thrillers from Poland. The real mystery is why it took Americans so long to discover them.

B.A. Paris

A world–class author!

JP Delaney

Gruesome, gripping and disturbing, The Illusionist is the work of a master storyteller.

Alex Marwood

Intelligent, exciting and ingenious… what more could one ask for?

Tess Gerritsen

Powerful and frightening, with an utterly fascinating hero!  THE BEHAVIORIST is a story impossible to put down!

Blake Crouch

A thrilling exploration of man’s desire to understand the unknown.

Dmitry Glukhovsky


Michael Cobley

He pulls his readers in then takes them on a rollercoaster ride.

Robert J. Sawyer

Clever, heartfelt, and engaging.