Murder on Cold Street by Sherry Thomas (2020) Penguin Publishing Group

In which our heroine, Charlotte Holmes, appearing in her fifth book of the series, continues to work as the confidant of a non-existent brother, Sherlock Holmes, who is supposedly bedridden with sickness.  This time it is Inspector Treadles who is in trouble, and it is up to Holmes and her close associates to prove he is innocent of a double murder.  Charlotte ups the game on her attraction to Lord Ingram, whom she has known since they were very young.  Still romance is mostly promises and no permanent situation presents itself in this book.

Like it's predecessors, the writing keeps you glued to the page trying to outdo Ms. Holmes in deducing the real culprits while keeping herself and her associates safe and sound.