I'm currently reading Barnabas Tew and the Case of the Hellenic Abduction by Columbkill Noonan. This book is the fifth in the Barnabas Tew Mystery series.
While practicing their yoga on the banks on the Ganges Victorian private investigator Barnabas Tew and his assistant, Wilfred, are unceremoniously whisked away and deposited in Ancient Greece. Upon Odin's recommendation Zeus has summoned the duo to help him rescue a princess. Barnabas and Wilfred undertake the mission, but find Zeus's intentions not entirely honorable and are unsure if they should indeed find the woman for him. Running into various deities and other mythological beings from Ancient Greece Barnabas and Wilfred will have to keep on their toes or risk death...again!