Possessing extraordinary powers, including the ability to bring artwork to life, twelve-year-old twins Matt and Emily are sought by villains trying to access the terrors of Hollow Earth, a place where demons and mythological beasts lie trapped for eternity.

• ISBN: 9781442458529
• Published: 2012 , Aladdin
• Themes: action and adventure, Fantasy and magic, growing up, Siblings
• Descriptors: England (UK), Fantasy, Intermediate (ages 9-14)
• No. of pages: 382