The Miss Billy Trilogy by Eleanor H. Porter

The three books of the MISS BILLY series follow the adventures of Billy Neilson, an 18-year-old girl whose entire family has died. Her only hope is her late father's best friend (William Henshaw), whom she writes and, without telling him she's a girl, hopes he can take her in. Henshaw agrees, finding to his consternation that young Billy is a girl, who soon turns his world upside down with her ways. Includes an active table of contents for easy navigation.

• Miss Billy
• Miss Billy's Decision
• Miss Billy--Married