I just finished reading through all of them and found them very insightful. Some sections are useful to aspiring entrepreneurs as they cover the basics of financing, vesting, etc. Most sections are useful to all entrepreneurs as they present a very thoughtful and often counter intuitive, not to mention contrarian, approach to entrepreneurship. By forcing aspiring entrepreneurs to ponder distribution, “secrets” and much more than just product/market fit, it pushes them to refine their idea and be more thoughtful about which startup to create.

They are dense, but fascinating so read them in order and without distractions:
http://blakemasters.com/peter-thiels-cs183-startup