Haldeman-Julius Company, 1920s. Softcover. Set of 7 titles in the series. Condition ranges from very good to fair. Included: #42 The Origin of the Human Race (VG). #86 On Reading (VG). #101 Thoughts of Pascal (VG). #159 A Guide to Plato (F, cover has wear and tear). #279 Will O'The.....