Terrible news to have to post, considering how many people on Dakka are likely to have read and grown up with his books:
http://www.guardian-series.co.uk/news/14937849.Legendary_fantasy_author_Joe_Dever_dies/
He died this morning, sounds like surgical complications, confirmed by family members on facebook.
His books were fantastic, I have over fifty of them on a bookcase behind me, and still enjoy reading them. For me and many others they were the entry point into the hobby of wargaming and interest in fantasy literature and games.
He recently released a fantastic video game/ gamebook hybrid which I highly recommend (Joe Dever's Lone Wolf is the title), and was starting to write and publish new Lone Wolf books. with book 29 released earlier this year. Sadly, he died before his plans to publish books 30-32 could be completed. He was ambitious and hard working right up until his death and really cared about his fans.
The world has lost a fantastic author and really wonderful person, I'm glad I had the chance to talk to him briefly on facebook earlier this summer and express how much the books meant to me growing up.