High Quality Content by WIKIPEDIA articles! ARIA, is a science fiction trilogy by British author Geoff Nelder. This article concerns Left Luggage, the first volume of the trilogy. After a first draft in 2005 it was published in the UK and US by LL-Publications in 2012. Left Luggage is the first novel featuring ARIA – Alien Retrograde Infectious Amnesia. As far as can be ascertained it is also the first novel to feature the concept of infectious amnesia in any book or film.