From Searching for Dragons by Patricia C. Wrede, ISBN-13: 978-0-15-200898-7, p. 89: “Were the wizards behind the mysterious burned area Mendanbar had found?”
The issue: multiple.
- “behind” could be indicating the physical position of the wizards.
- Were the wizards behind (as in involved in) the burning of the burned area?
- The whole quote could have been a clause indentifying the wizards exactly instead of being a full sentence. For example, it could have continued “… anywhere near here?”
Point 2 is the intended meaning.