Can you get to grip with numbers and Escape from Hotel Infinity? Finding the answers enables readers to advance through the story, learning more about maths with every step they take. Clues are dotted along the way, and wrong turns will direct readers towards the right answer.

"The first few years of Brian Reyes' life were unremarkable--nothing weird about this kid, no sir. Then, one day, a bump appeared on his head, and it grew... and grew... and grew until it was a full-blown, sparkling, singing unicorn horn. That's absolutely the last thing a shy kid like Brian wants, but destiny waits for no unicorn boy. Luckily, Brian has his reassuring pal Avery to keep him grounded as weird occurrences start stacking up, like Brian's...