Sophie Schrey (Author) Sophie writes, commissions and edits books for children. Her titles include the bestselling Where’s the Unicorn? series, The Anti-Boredom Activity Book and Barack Obama. She lives and works in London. Follow Sophie on Instagram and Twitter @SophSchrey.Jonny Marx (Author) Jonny Marx is a book editor and the author behind 'The Book of Beasts' series.

Where's the Unicorn? is set to thrill puzzle fans with its fiendishly difficult brainteasers

Sophie Schrey (Author) Sophie writes, commissions and edits books for children. Her titles include the bestselling Where’s the Unicorn? series, The Anti-Boredom Activity Book and Barack Obama. She lives and works in London. Follow Sophie on Instagram and Twitter @SophSchrey.Jonny Marx (Author) Jonny Marx is a book editor and the author behind 'The Book of Beasts' series.

Where's the Unicorn? is set to thrill puzzle fans with its fiendishly difficult brainteasers

Sophie Schrey (Author) Sophie writes, commissions and edits books for children. Her titles include the bestselling Where’s the Unicorn? series, The Anti-Boredom Activity Book and Barack Obama. She lives and works in London. Follow Sophie on Instagram and Twitter @SophSchrey.Jonny Marx (Author) Jonny Marx is a book editor and the author behind 'The Book of Beasts' series.

Where's the Unicorn? is set to thrill puzzle fans with its fiendishly difficult brainteasers