Doc Sidhe

Take a standard tale about someone travelling from our world to faerie, and dress it up in more modern contrivances (our world is in modern time, and faerie-land in approximately 1930s tech), add in enough adventure and daring-do to make Lester Dent or Ian Fleming blush, and you've got Doc Sidhe.

If you can imagine Neil Gaiman wanting to do a Doc Savage homage in Sandman, or Warren Ellis putting a faerie story into Planetary, that's roughly what you have here in temperment. Add in likeable characters and a plot that puts the fate of two worlds at risk, and you've got a winner.