This study aid site offers a host of resources for students and teachers from junior-high through college. Probably the most prominent of these are 100 Barron's Booknotes and 200 MonkeyNotes book summaries, searchable by keyword or browseable by title or author. The site also offers subject guides, SAT and GRE exam guides, a digital library of some 2,000 out-of-copyright works, college planning and test preparation advice, among others. Free registration is required, and the site is advertiser-supported, as is readily apparent. Still, there is quite a bit here, and the site as a whole is worth a look.