An entertaining mystery, but I don't understand why the two orgy scenes were necessary... I don't really consider myself a prude, and sex in books is fine and can aid a story, but really? Orgies? I had already gathered that the planned murder victim, Gerald, was rather hedonistic based on the sumptuous setting, lavish entertainment, and the array of beautiful young men he surrounded himself with. Did not need the extra help on this one. 
 I did enjoy the riddles Phryne had to figure out along the way. Greenwood has a fun way of intertwining several mini mysteries into one larger case. It's neat to see how they all relate, and how each wraps up in its own way and time.