It is called Frog Music. And it comes out this Tuesday, the 1st.
Here is a plot/blurb thing:
Summer of 1876: San Francisco is in the fierce grip of a record-breaking heatwave and a smallpox epidemic. Through the window of a railroad saloon, a young woman called Jenny Bonnet is shot dead. The survivor, her friend Blanche Beunon, is a French burlesque dancer. Over the next three days, she will risk everything to bring Jenny's murderer to justice – if he doesn't track her down first.
The story Blanche struggles to piece together is one of free-love bohemians, desperate paupers and arrogant millionaires; of jealous men, icy women and damaged children. It's the secret life of Jenny herself, a notorious character who breaks the law every morning by getting dressed: a charmer as slippery as the frogs she hunts.
In thrilling, cinematic style, Frog Music digs up a long-forgotten, never-solved crime. Full of songs that migrated across the world, Emma Donoghue's lyrical tale of love and bloodshed among lowlifes captures the pulse of a boom town like no other.
I have no idea how popular Donoghue is in general, let alone around here. Her last book, Room, is one of my favorites of all time. So I'm excited for this.
Edited to add:
There's a trailer. I always forget that book trailers are a "thing".