While visiting a patient, midwife Sarah Brandt learns thata young girl in the rooming house has been murdered and is asked by Sergeant Frank Malloy to help investigate; however, Sarah discovers the girl is from a prominent New York family which intends to block every effort to bring the killer to justice.

"Turn-of-the-century New York City midwife Sarah Brandt arrives at the elegant home of a famed magnetic healer to deliver a baby and finds the healer dead of an apparent suicide--and soon the baby turns mysteriously ill, leading Sarah to dig deeper into the happenings surrounding her." --

Sarah Brandt, a midwife in turn-of-the-century New York City, has seen more than her share of joy and sorrow, birth and death. Now she will see for the first time how the squalor of the streets can breed madness and murder…

 

The Prodigal Son Mission on Mulberry Bend stands as a refuge for girls who otherwise would have to live by selling the only thing they have of value—themselves. The work being done there so impresses

...

When the affluent Lintons of Lenox Hill summon Sarah Brandt to examine their teenage daughter, their worst fear is confirmed: she is with child. The pregnancy is a mystery, however, as the young woman—mentally still a child herself—is never left on her own and denies that any man has ever hurt her. It’s a delicate situation, casting suspicion on those close to the Lintons, including their beloved minister, the Reverend Oliver Upchurch.

But

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In Chinatown to deliver a baby, Sarah Brandt meets a group of women she might otherwise never have come across: Irish girls who, after alighting on Ellis Island alone, have married Chinese men in the same predicament. But with bigotry in New York from every side, their mixed-race children are often treated badly, by the Irish, the Chinese—even the police.
 
When the new mother’s half-Chinese, half-Irish, 15-year-old niece...

Turn-of-the-century New York City shines in the Gaslight mystery series.
Midwife and sleuth Sarah Brandt and Detective Sergeant Frank Malloy must protect Sarah's mother from scandal after she tries to contact her dead daughter during a séance that sends one of the attendees into the afterlife. But first, they have to determine how the woman was murdered in the pitch dark when all the suspects were holding hands.

When a philanthropist's involvement in the rescue of a prostitute leads to murder, Sarah Brandt's significant other, Detective Sgt. Frank Malloy, can't prevent her from investigating. Set at the end of the 19th century in New York City.

"Sarah Brandt is shattered when she learns that a woman has inquired at Hope's Daughters Mission for Catherine, the abandoned child she has taken as her daughter. The woman claims she was Catherine's nursemaid, now acting on behalf of the girl's mother to reunite them. Unwilling to simply hand Catherine over to a complete stranger, Sarah asks Malloy to investigate. But when he goes to interview the woman at her tenement in Chelsea, he finds she has...

"In the midst of Sarah and Frank's wedding preparations, Sarah accompanies her mother on a condolence call to the Upper West Side, where Charles Fairfax, the son of family friends, has died unexpectedly after suffering from a mysterious disease. It is a tragic and all-too-common story or so it seems. Charles's father asks to speak with Sarah privately. He believes his son was poisoned and would like Sarah and Frank to look into the matter with the...

"In the latest from the national bestselling author of Murder on St. Nicholas Avenue, former police sergeant Frank Malloy and his wife adjust to life in New York high society as they investigate a death in the field of higher learning... A Gaslight Mystery After spending his first few weeks as a private detective by investigating infidelities of the wealthy, Frank has a more serious case at hand. Abigail Northrup of Tarrytown, New York, was her parents'...

"When a murder hits close to home, Frank finds himself in an unusual position--the prime suspect in the latest installment of the national bestselling Gaslight Mystery series... Frank and Sarah Malloy are enjoying married life and looking to make their family official by adopting Catherine, the child Sarah rescued and has been raising as her daughter. The newlyweds soon discover, Parnell Vaughn, an actor and Catherine's legal father, is looking to...