On  dotEPUB.com you can install a small bookmarklet that allows you to convert any webpage into an e-book.

Readers just drag a bookmarklet (or favlet) for Google Chrome, Mozilla Firefox or Safari into their browser bookmark bar. Google Chrome user can install the dotEPUB extension instead.

Content producers (editors, authors) can install a widget. Developers can use the API for more customizable results.

“Download webpages to any epub-compatible device: e-readers, tablets, smartphones, netbooks, desktop computers…

Save now and immersively read later (even offline) those long and deep articles you didn’t have time to read while browsing.

Build a personal library of your favorite blog posts, news articles, etc.

Compatible with the IPhone, the IPod Touch, the IPad, the Sony Reader, the Nook, the iLiad, the BeBook, the Cool-er, the CyBook, the Alex eReader, the Kobo eReader, the Elonex eBook, the eSlick, the eClicto, the Hanlin eReader, the QUE ProReader, the Papyre, the Leqtor…”