Murder in Chelsea (Gaslight Mystery) by Victoria Thompson

Published in 2013 by Berkley Prime Crime.

Although # 15 in the Gaslight Series, this can be read as a standalone. Sara Brandt, midwife in New York’s tenement area in the 1800s, and Detective Malloy work together to protect the abandoned child Brandt is mothering.  Moving through the life of an aspiring actress, several murders and a wealthy man from the Upper East Side Brandt and Malloy protect the child and solve the murders.  Those hooked on the series will love the setup for the next book.