Books in Children's Book Series (sorted alphabetically)
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Pee-wee Harris Adrift Percy Keese Fitzhugh
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Pee-wee Harris on the Trail Percy Keese Fitzhugh
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Peggy Stewart at School Gabrielle E. Jackson
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Peggy Stewart, Navy Girl, at Home Gabrielle E. Jackson
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Pluck on the Long Trail; Or, Boy Scouts in the Rockies Edwin L. Sabin
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Polly and Eleanor Lillian Elizabeth Roy
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Polly of Pebbly Pit Lillian Elizabeth Roy
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Polly's Business Venture Lillian Elizabeth Roy
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Princess Polly At Play Amy Brooks
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Princess Polly's Gay Winter Amy Brooks
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Princess Polly's Playmates Amy Brooks
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Prudy Keeping House Sophie May
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Puritan Twins Lucy Fitch Perkins
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Queen Hildegarde Laura Elizabeth Howe Richards
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Radio Boys Cronies; Or, Bill Brown's Radio Wayne Whipple and S. F. Aaron
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Radio Boys' First Wireless; Or, Winning the Ferberton Prize Allen Chapman
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Radio Boys in the Thousand Islands; Or, The Yankee-Canadian Wireless Trail Frank Honeywell
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Radio Boys Loyalty; Or, Bill Brown Listens In Wayne Whipple and S. F. Aaron
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Radio Boys on the Mexican Border Gerald Breckenridge
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Radio Boys Trailing a Voice; Or, Solving a Wireless Mystery Allen Chapman
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Ranger Boys and the Border Smugglers Claude A. LaBelle
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Red Cross Girls with the Russian Army Margaret Vandercook
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Rollo at Play; Or, Safe Amusements Jacob Abbott
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Rollo at Work Jacob Abbott
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Rollo in Geneva Jacob Abbott