Hi, I'm Mark Hendriksen, a children's book author based in London. Next up, publication date end of September 2025 for Halloween is, 'The Poo who screamed Boo!.' 

Here's a recent clip of me being interviewed at The London Book Fair in March 2025 from my previous book, 'All Animals Poo and We Do Too.' 

I've been a publisher for some time, for the tourism industry and the first in a a series of children's book I've written is out now. Meanwhile ,other titles (below*) are written and heading via the editors and illustrators towards publication from 'Halloween' 2025.

'All Animals Poo and We Do Too', an A-Z journey through the world of poop. Published August 2023.

These fun and informative books are perfect for children and parents who want to explore and get to the bottom of the fascinating world of poop, including our own.  

With colourful illustrations by the award-winning Canadian illustrator Keenan Hopson, 'All Animals Poo and We Do Too' (the first in a series) takes readers on a hilarious and educational journey through the world of poop. From ants (in your pants) to zebras, this book explores the different types of poop produced by animals and humans, and provides fascinating facts and anecdotes along the way, mixed with a touch of humour.

You can order either of these book from leading bookshops and on Amazon, or as an e.book.

* Here's the list of upcoming titles WIP:

Halloween - The Poo who screamed Boo! release date end early October 2025. endorsed by Terry Dear, acclaimed author of the 'Horrible Histories' series.

Christmas - Rudolph's Christmas Mischief, release date early Nov, 2025.

Easter - [WIP] release date February 2026

Personalised Birthday Book - Happy Birthday to You, from... ‘Guess Who?’ mid 2026.

The History (an ABC) of Toilets, Sewers, Poo & Pee. A humorous, informative and brilliantly illustrated A-Z of the history of the toilet. release date late 2026.

The Miracle of Old Perithia. The story behind bringing 'Corfu's Oldest Village' back to life. release in early 2027.

Or email me below to learn more about my books and background. 

Thank you for considering my books for the young readers in your life. I'm excited to share my passion for writing about poop, toilets and taboos with you!