Social networking sites cast a wide net, not only in the sheer number of sites that exist on the Internet but also in terms of their application and usefulness. The last column, in "PSQ" v.4 (3), examined sites that could assist professionals with outreach, networking, and collaboration. In this second column dedicated to social networking sites, the emphasis is on sites related to books, blogs, wikis, and Internet bookmarking. Public services librarians should be aware of such sites and open-minded to the possibility of offering traditional library services via these new online mechanisms. The sites reviewed in this column have been selected as quality examples of social networking sites that have great potential for use within libraries, enabling library professionals to better collaborate with one another and reach out to patrons. (Contains 2 notes.) [For Part I, see EJ877356.]