From the blurb: 

Vlad Taltos is an Easterner an underprivileged human in an Empire of tall, powerful, long-lived Dragaerans. He made a career for himself in House Jhereg, the Dragaeran clan in charge of the Empire's organized crime. But the day came when the Jhereg wanted Vlad dead, and he's been on the run ever since. He has plenty of friends among the Dragaeran highborn, including an undead wizard and a god or two. But as long as the Jhereg have a price on his head, Vlad's life is messy.

Meanwhile, for years, Vlad's path has been repeatedly crossed by Devera, a small Dragaeran girl of indeterminate powers who turns up at the oddest moments in his life.

Now Devera has appeared again to lead Vlad into a mysterious, seemingly empty manor overlooking the Great Sea. Inside this structure are corridors that double back on themselves, rooms that look out over other worlds, and just maybe answers to some of Vlad's long-asked questions about his world and his place in it. If only Devera can be persuaded to stop disappearing in the middle of his conversations with her.

This is something of a closed house murder mystery that Vlad has to solve.  It's entertaining but not as good as previous installments of the series.  I miss the inclusion of Vlad's usual cast of unusual friends and acquaintances.

NOTE:  While this novel is a complete story, new readers will miss out on references to previous books in the series.