There are hints at what could happen if Leeds loses control - if he imagines too many aspects at once or reminds some of the more sensitive ones that they don’t really exist - regularly teasing at something much darker. Leeds' dependence on his 'aspects' for knowledge - they store everything he's ever seen or learnt - is contrasted by their detrimental effect on his psychology, making him walk a fine line for the sake of 'sanity'. Legion clips along at Sanderson's usual, peppy pace, the narrative relying heavily on the relationship between the protagonist and his cohorts to keep things moving. Tasked with finding the person who's stolen a camera that takes photos of the past, Leeds and his team of imaginary intelligentsia head to Jerusalem to find the thief before the magical contraption falls into the wrong hands. The celebrated author’s 2011 novella Legion (reprinted this year by Gollancz) is somewhat Butcheresque, offering a more reluctant Harry Dresden in the form of Stephen Leeds, a 'sane' man who uses a host of talented hallucinations (his 'legion') to solve cases for a fee.

If you thought a book written on a plane might be a bit rough around the edges - a few plot holes, perhaps, or precious little scene setting - think again, because when Brandon Sanderson does it, the result is nothing less than first class.

Legion book brandon sanderson