Muppy Heingardt: 2 books

Abraham Surd approaches mysteries with highly serendipitous deduction. Margaret Garine is calculating and piercing. Abraham challenges Margaret with his current problem while frustrating her skills of observation with petty misdirection.

Natalie the witch believes she has been turned into a vampire. She recruits dull Wooster and ditzy Mitsky to help solve her problem. Together, the three set about unraveling the truth through a process that might almost be considered somewhat similar to deduction. Maybe.