Review: KANT IN 90 MINUTES by Paul Strathern

Immanuel Kant is another philosopher ideally suited for this sort of treatment: his books are both influential and nearly incomprehensible.

Ayn Rand, a greater writer and lesser philosopher, rejected Christianity because of Kant. He wrote long after David Hume's empiricism essentially killed philosophy, yet he developed one of the largest and most complex philosophies of all time (rivaled only by that of his follower, Hegel).

If you haven't guessed, I liked this book. Unless you like reading 800-page philosophy books, I recommend it.