Croesus
Adventurer
Myth Adventures - the M.Y.T.H. I.N.C. series by Robert Lynn Asprin
Seconded - this is a great series. Start with Another Fine Myth
Note: Asprin wrote the first 10 books within a few years, in the 70's and 80's. These ten are, IMO, the best of the series. Then he took quite a bit of time off for various personal reasons. He finally finished the last two he contracted for, but honestly, those aren't as good as the previous stories. He then collaborated with Jodi Lynn Nye to write several more before he died a year ago.
Don't let the number of books intimidate you. Each book pretty much stands on its own (though each builds on what happened before), and they are quick, enjoyable reads.