Diana Gabaldon - author homepage
Ladies of Lallybroch - a fan site and group devoted to Diana Gabaldon and her Outlander series
PaperBackSwap - exactly what it sounds like, a site for book swapping
Fantastic Fiction - a wonderful site for searching out books, especially series books and their order
Fetch Book - a site for locating and finding lowest priced books
Google Reader - a super way to read and keep track of RSS subscriptions (blogs etc.)
Grammar Girl - quick tips for better writing
A.Word.A.Day - a fun way to expand the vocabulary