One of Heidegger's works that is "easier" to read. Does require some background information, but a good way to introduce one's self to Heidegger and his peculiar writing style.

Biography of Hume with notes on his major ideas and philosophy. Includes a timeline for quick reference.

At this site from the Galileo Project of Rice University, you can view factual information about Locke's life. Written in lists; easy to read. Includes categories such as nationality, education, religion, scientific disciplines, and...