Ruth Fielding series
30 works, 30 primary works
The Ruth Fielding Series is a 30 volume series that was published by Cupples and Leon from 1913 through 1934. Three authors wrote the series under the pseudonym of Alice B. Emerson. W. Bert Foster wrote volumes 1 through 19; Elizabeth M. Duffield Ward wrote volumes 20 through 22; and Mildred A. Wirt Benson wrote volumes 23 through 30.