Doctor Glas is a 1905 epistolary novel by Hjalmar Söderberg which tells the story of a physician in 19th-century Sweden who deals with moral and love issues.

Gregorius' beautiful young wife confides in Dr. Glas that her sex life is making her miserable and asks for his help.

He attempts to intervene, but the Reverend refuses to give up his "marital rights" – she must have sex with him whether she likes it or not.

The novel also deals with issues such as abortion, women's rights, suicide, euthanasia, and eugenics.

Not surprisingly, the book triggered a violent campaign against its author who was subsequently vilified in Swedish literary circles.