Martin Moone is about to finish primary school and feels he hasn't achieved very much. He's desperate to get his picture on the school's Winners' Wall and decides that entering the Invention Convention science competition will definitely earn him everlasting respect. But Martin - along with his teammates Trevor, Padraic and the ever terrifying Declan Mannion - is having trouble coming up with a winning idea.

Martin's imaginary friend, Sean, comes to the rescue, and together they concoct a plan to beat the snooty kids from the posh school in town. If they can get their hands on some Notion Potion, a mythical brain-boosting beverage, then Martin will have all the ideas he needs. And so the gang embarks on a dangerous (imaginary) journey in their quest to become 'Boyle's first Junior Genius'.

The Notion Potion is the hilarious third book in the Moone Boy series, based on the Sky TV series from dream team Chris O'Dowd and Nick Vincent Murphy

Chris O'Dowd is an award-winning actor, writer and director. He has appeared in many films, including Bridesmaids, The Sapphires and This Is 40. He has also starred in cult TV series The IT Crowd, Family Tree and Girls, as well as Moone Boy for Sky, which he wrote and directed with his friend Nick Vincent Murphy. Together with Nick he created the Moone Boy series of books to accompany the TV show with titles including Moone Boy: The Blunder Years and Moone Boy: The Fish Detective. Chris is from Roscommon, Ireland, but is currently based in LA. He studied politics at Dublin University before training at LAMDA.