Sean Oakes, a student of Jack Kornfield, produced a number of short Practice Guides on the concepts and practice of Insight Meditation that are available on the Spirit Rock website. One of them is a good introduction to the Four Noble Truths. You can find that Practice Guide here: The Four Noble Truths The other Practice Guides available on the Spirit Rock website cover a wide variety of topics, and are available here: Spirit Rock Dharma Library
The book, The Issue at Hand, by Gil Fronsdal is a very good introduction to Insight Meditation, and it is freely available from the Insight Meditation Center, where Gil teaches. The first chapter of the book is on the Four Noble Truths. You can find that chapter, as well as the rest of the book, at this website: Insight Meditation Center