- E-bookThe Pocket Guide to Critical ThinkingRichard L. Epstein
- E-bookHow to ReasonRichard L. Epstein
- E-bookHow to Reason + Reasoning in the SciencesRichard L. Epstein
- E-bookConventional GesturesRichard L. Epstein
- E-bookGuía Breve para el Pensamiento CríticoRichard L. Epstein
- E-bookAmerican GesturesAlex Raffi