For me also the Harry Potter books.
Also I would love the read the Hamish Macbeth series but although BoB has several since today they haven't got the first one of the series isn't available and I want to start at the beginning.
Another series I would love to have Lilian Jackson Braun of The Cat Who... as ebooks. They're available in the US but only as PDF which isn't my favorite format (especially when it concerns backlists).
Lastly I would love to see more (horror) anthologies. Just because I'm too lazy to search out individual stories myself
*Bianca