That sounds like the title of the Cygnet book. They all seemed to be standalones, or at least not sequels, so I got all 3 books. Which of the three would be the best to start with(and is there one to avoid)

Amazon does have the Riddle-Master omnibus, so it will theoretically be in my next order with them.

Hmm...his father...but that...that might spoil necromancer for me...*frets*