Leo Hartas, and recently Leo was asked to do five new illustrations for a special colour edition of the book published by Megara Entertainment. It's not just window dressing. Megara also commissioned Way of the Tiger scribe David Walters to write a bunch of new sections for the book, expanding the adventure by about 30%.
David has done a fang-tastic job of matching the style and mood of the original book, while also making it more cohesive by building up the sense of the vampire as a threat throughout. So it's no longer just a dungeon bash. Now it really feels like you might find Christopher Lee and Peter Cushing around the next corner. (Possibly with Jack MacGowran and Alfie Bass not all that far away.)
You can get the new edition exclusively from Megara, while the original version is available from Fabled Lands Publishing on Amazon. Take your pick.