This is the third in Andrea Penrose's Wrexford and Sloane Regency mystery series. It's not necessary to have read the first two to enjoy this one, because Penrose gives enough catch-up information that you'll understand the characters' arc well enough. That said, it's not a bad idea to read the first two. They are interesting and at the moment are even on sale.
Our two main characters/sleuths are (1) widow Charlotte Sloane, who makes her living as anonymous cartoonist and political satirist A.J. Quill and (2) the Earl of Wrexford, peer of the aristocracy and amateur scientist. Charlotte's topical illustrations are extremely popular with the public and can even sway public opinion at times. And Charlotte has a secret. Although living a lower socioeconomic life, she is actually Lady Charlotte, a member of the peerage who was disowned by her family when, at seventeen, she ran off to Italy with her drawing instructor, whom she married.
Now back in London, Charlotte lives a quiet life with two young street orphans she has taken under her wing, named Hawk and Raven. She and the boys know their way perfectly around the seedier streets of London, the boys, of course, because they grew up there. Charlotte herself will at times dress up as a street urchin named Phoenix when she needs the freedom to move around the streets that is not afforded to women in general.
One of my favorite things about this series is those two street boys and their lovely interactions and relationship with Charlotte, and also with Lord Wrexford. Another favorite thing for me is Penrose's knowledge of the Regency period and her excellent use of this in the various mysteries and their development.
This third installment deals with one of the scientific innovations of the times: That of electricity and the recent (1802) invention by Alexander Volta of the voltaic pile, an early battery to generate electricity through chemistry. Is this new scientific invention being used improperly by certain individuals? It is looking that way.
When Charlotte's cousin and dear childhood friend Cedric, Lord Chittenden, is found brutally murdered and his twin brother Nicholas is suspected of the crime, it's up to Charlotte to prove the innocence of the one remaining twin, also dear to her. Wrexford, of course, is on hand to aid and abet her, as usual, and their investigations take them from the prison where Nicholas is being held to the streets of London, seedy and affluent, to the halls of science, to the Eos Society, whose upper-class members indulge in various scientific discussions and experimentation.
Is there something not quite aboveboard about the Eos Society? And what is the explanation for the burns that were found on Cedric's body during his autopsy? They intrigue Wrexford, the amateur chemist, and he has his thoughts about what may be going on. So this all must be investigated, with lots of possible suspects, lots of red herrings, and even a bit of a Perils of Pauline happening at the end (with a very competent "Pauline"). All in all, it was an enjoyable read for me.
I've enjoyed Penrose's writing for years. I began reading her Regency romances written under the pen name Andrea Pickens almost two decades ago and now am enjoying these Regency mysteries perhaps even more. She's a skillful author and makes her stories very readable. Her characters are well drawn, the dialogue is intelligent, and the plots are clever and well paced.
If you are a romance lover, there's a hint of that developing between Sloane and Wrexford, but if you do not enjoy romance with your mysteries, this is low-key enough that it will not annoy you, I believe.