Hello Kun, Participants in the Global LOCKSS Network can cache purchased e-books from publishers who have both provided permission and host their content on crawlable platforms. Major supported publishers include Muse, Emerald, Thieme, IGI Global, and some publishers on Atypon, HighWire, and Pub2Web platforms. You can see a more complete list of LOCKSS-archivable e-books linked from this page: https://www.lockss.org/community/publishers-titles-gln/.
Please feel free to contact me off-list if you have additional questions. Thanks! ~Nicholas -- Nicholas Taylor | Program Manager, LOCKSS and Web Archiving | Stanford Libraries DLSS
