This is not a polularization /adult-education style presentation. Magee sees things form the inside; it is his own formation of philosophical ideas & techniques that we witness.
Magee was close enough to Popper to present us with his ideas first-hand (nobody reads Popper; people read about him). He also debunks a few idiotic myths about Wittgenstein as an atomist (Magee read W and realized that people read commentary on him rarely the original).
Magee writes with the remarkable clarity of the English philosophers/thinkers.