The California Digital Library has been working on bringing a wide array of primary and secondary materials online over the past few years, and this particular digital endeavor is one that will delight both academics and those who are just plain curious about everything from the influence of Elvis Presley on Mexican popular music to the ceremonial costumes of the Pueblo Indians. All told, the...

Hosted by the University of Pennsylvania Library, the Online Books Page Web site "facilitates access to books that are freely readable over the Internet...and aims to encourage the development of such online books, for the benefit and edification of all." The over 18,000 listings can be searched or browsed by author, title, and subject, of which every major physical science subject is represented....