Norah O'Neill, a maid and friend from Hilda’s previous life, begs for Hilda’s help.  Norah’s husband, Sean, has been arrested for the murder of a hired hand.  Sean is innocent, but circumstances are against him. Hilda enlists the aid of her Baker Street Irregulars (young boys poor and some homeless) to investigate the circumstances surrounding the murder. In addition, she has her new society acquaintances organize a Christmas party for the unemployed boys and helps form a Boys’ Club to help them.

Indigo Christmas gives a sense of the city and street life of the Midwest in 1904. There is a fascinating picture of the daily life of all classes, their customs and prejudices. The characters are well developed as human beings with natural stresses. The characters of the Street Boys are especially realistic. The discussion of class distinctions is presented with a picture of the operations of households in different social levels. The dilemma that faces Hilda is portrayed with sympathy.

This is an enjoyable and pleasant book to continue following the story of Hilda and her family and friends.   Hopefully there will be more to come.