Homer Kelly returns to help his wife's niece, Annie Swann, who has gained success as a children's book illustrator. Annie has built a fabulous addition to her house and is renting out the old section. Part of her new area is a 35-foot wall, on which Annie plans to paint her masterpiece. However, a mysterious face keeps appearing -- no matter how often Annie paints it out. One day, Annie returns home to find her tenants' handicapped son apparently...

Sleuth Homer Kelly, a policeman-turned-professor and his camera-totting wife, Mary, travel to Venice for a conference on rare books. While there, thanks to a picture Mary took, they solve the theft of rare artifacts and a murder.

Jane Langton returns with her "most inventive and exhilarating Homer Kelly mystery" (New York Times Books Review). At a church in Boston, an abandoned baby suddenly appears. Who is he? Organist Alan Starr and Homer Kelly team up to find out--with possibly deadly results.

An exhibit of the work of the Dutch artist M. C. Escher is being held in Cambridge, Massachusetts, home to amateur sleuths Homer and Mary Kelly and their friend Leonard Sheldrake. At the exhibit, Leonard, an avid Escher fan, falls instantly in love with a woman in a green coat who is equally enthralled by Escher's brilliance. To Leonard's dismay, she hurriedly leaves the exhibit, hinting to him that if he knew her better, he would not love her. Homer...

Homer Kelly is trying to cope with the changes to his beloved Concord: an influx of tourists and boutiques, a convergence of homeless, even a proposed mall on the banks of Walden Pond. But when some retirees begins to meet untimely deaths, he draws the line.

As Eleanor and Edward follow the clues scratched on an attic window, they become involved in a series of dreamlike adventures that are frighteningly real and compel them to search for Prince Krishna's treasure.