Deltora Quest is the collective title for three distinct series of children's fantasy books, written by Australian author Emily Rodda. It follows the adventures of three companions as they journey across the fictitious land of Deltora, endeavouring to recover the seven gems stolen from the magical Belt of Deltora and defeat allies of the evil Shadow Lord. The series was first published in Australia in 2000, and has since been published in more than 30 countries. The series has sold over 18 million copies worldwide, including over 2 million in Australia. It is published by Scholastic in Australia and the United States. In most countries, the series is illustrated by Marc McBride.