The Ayn Rand Bookstore is selling two of Leonard Peikoff’s excellent lecture courses at a substantial discount:

Induction in Physics and Philosophy
By Leonard Peikoff

These historic lectures present, for the first time, the solution to the problem of induction–and thereby complete, in every essential respect, the validation of reason …

(13 hrs., 42 min., across 7 sessions, with Q & A)

Audio CD; 14-CD set:
Regular price: $210
Sale price: $145

Audiocassette; 12-tape set:
Regular price: $180
Sale price: $125

The Dim Hypothesis: The Epistemological Mechanics by which Philosophy Shapes Society
By Leonard Peikoff

This 15-session course–part lecture, part discussion–was presented live to a worldwide audience by phone and on the Internet. It is based on Dr. Peikoff’s The DIM Hypothesis (book-in-progress), in which he looks at the role of integration in the culture and in practical life …

(22 hrs., 9 min., with Q & A)

Audio CD; 30-CD set:
Regular price: $310
Sale price: $215

Audiocassette; 15-tape set:
Regular price: $265
Sale price: $185

The sale ends on October 1st.