These are mostly mysteries in a fantasy setting, in which the maincharacter, Liam Rhenford, is assisted by the dragon Fanuilh, formerlythe familiar of the wizard who was the murder victim in his first"case".
Fanuilh (1994, ISBN 0-441-00055-X )
:When the wizard Tarquin is killed in his bed, there are only two mourners...his miniature dragon familiar, Fanuilh, and his friend, scholar Liam Rhenford. Liam isn't about to get involved until Fanuilh magically bonds with him. Compelled by the dragon's desire for justice, Liam learns magic...but will it be enough to save Fanuilh?