As I gather, Seed magazine occasionally puts together one-page "cribsheets" on various scientific topics. It has recently put one out on string theory. Clicking here will take you to Seed's page about the string theory cribsheet, where, after scrolling down a bit on the new page, you can download your own copy of the sheet.
Naturally, I commend the idea of trying to bring physics concepts to a broad audience. Further, I would say that, given the space limitations of a single page, the cribsheet covers a lot of ground. Further reading is obviously necessary for a fuller understanding, however, such as some of the books I have reviewed over the last couple of years on this blog.