claim: Mars is the site of Valles Marineris, one of the largest canyons in the Solar System.
evidence: Angie Sage -LRB- born 20 June 1952 -RRB- is the author of the Septimus Heap series which includes Magyk , Flyte , Physik , Queste , Syren , Darke and Fyre .. Septimus Heap. Septimus Heap. Magyk. Magyk. Flyte. Flyte. Physik. Physik. Syren. Syren ( book ). She is also the illustrator and / or writer of many children 's books , and is the new writer of the Araminta Spook series .. Angie Sage grew up in Thames Valley , London and Kent .. Thames Valley. Thames Valley. Her father was a publisher .. He would bring home blank books that she would fill with pictures and stories .. Sage first studied medicine , but changed her mind and went to Art School in Leicester .. There she studied Graphic Design and Illustration .. She began illustrating books after college .. Then she progressed to writing children stories , including toddler books and chapter books .. Her first novel was Septimus Heap  : Magyk .. Septimus Heap. Septimus Heap. Magyk. Magyk