A third book in the Jonathan Hunt series has been released (in Hungarian) called Magister M. The first in the series was the game Yoomurjak's Ring, and the second was a Hungarian book whose title translates into "The Devil's Stone". The plot of the latest book sounds very intriguing. In Magister M, an inscription is found scratched into a prison cell wall uncovered at a dig site which reads " Magister M Pécs 1872 - 1488 Visegrad", implying that the person was born after he died (time travel, anyone)?
In a perfect world we'd see both of the Jonathan Hunt books made into FMV games by Private Moon. In a slightly less perfect world, the two Hungarian sequel books would be translated into English. In the world as it is, I'd be very happy to get Private Moon's Tale of the Four Dragons released.
The situation is somewhat similar to Culpa Innata in that it was first released as a game and the sequel came out as a book.