21% Monster

Fun, fast-paced, high-octane action adventure, 21% Monster is a perfect page-turning new series for fans of Alex Rider, Percy Jackson and the MCU generation.

When Darren Devlin is arrested for destroying his school with his bare hands, it's not just the police who are after him. Enter Marek Masters, 14 years old, 19% alien, and the most intelligent, most wanted "almost human" alive. Marek is here to tell Darren the truth - he is 21% monster, and together they must take down the secret organisation that created them.

Darren and Marek are wanted, powerful and dangerous. And now it's payback time.

UK Delivery:

• Free delivery on all orders of £10 or more.
• £1.49 delivery fee on orders below £10.
• UK orders are shipped via Royal Mail 2nd Class.

International Delivery:

• Flat rate delivery charges vary by country.

Dispatch and Delivery Times:

• All orders are shipped from our warehouse in Northampton, UK within 48 hours of receipt during working hours.
• UK mainland orders typically arrive within 3-5 working days via Royal Mail 2nd Class.
• International estimated delivery times:
• Europe & Channel Islands: 7 to 10 working days
• USA: 7 to 15 working days
• Rest of the World: 9 to 21 working days

View our full delivery infomation here.