Hungry Spirits (A Daisy Gumm Majesty Mystery, Book 4‪)‬

Daisy Gumm Majesty, spiritualist to people with more money than sense, is asked by a Salvation Army captain to teach a cooking class for immigrant German ladies. Since Daisy's only culinary talent is burning water, she's sure the captain is nuts.
But Daisy steps up and forces herself to confront her own prejudices about Germans, whom she blames for her veteran-husband's war illness.
Then one of her students disappears and Daisy discovers that the help her students need has nothing to do with cooking—there's an anarchist's scheme about to boil over.

"Daisy's upbeat attitude gives her great appeal. Recommend to fans of Jacqueline Winspear's Maisie Dobbs." - Booklist

THE DAISY GUMM MAJESTY MYSTERIES, in series order
Strong Spirits
Fine Spirits
High Spirits
Hungry Spirits
Genteel Spirits
Ancient Spirits
Dark Spirits
Spirits Onstage
Unsettled Spirits
Bruised Spirits
Spirits United
Spirits Unearthed
Shaken Spirits