- E-bookThe Immaterial Structure of Human ExperienceGeorge Lowell Tollefson
- E-bookSpirit as Universal ConsciousnessGeorge Lowell Tollefson
- E-bookThe System of the MindGeorge Lowell Tollefson
- E-bookUnbridled Democracy and other philosophical reflectionsGeorge Lowell Tollefson
- E-bookThe Thinking ArtsGeorge Lowell Tollefson
- E-bookA Healer of NationsGeorge Lowell Tollefson
- E-bookThoughts on Creativity, Spirit, and the Ethical LifeGeorge Lowell Tollefson
- E-bookThe Thinking ProcessGeorge Lowell Tollefson
- E-bookThe Limits of ReasonGeorge Lowell Tollefson
- E-bookEthical ConsiderationsGeorge Lowell Tollefson
- E-bookMoral DemocracyGeorge Lowell Tollefson
- E-bookKey to the Philosophy of ImmaterialismGeorge Lowell Tollefson