It's fine if people leave links or ways to get to their blog but along with that one would want their comments to be meaningful and not superficial.
That's why if you're a new blogger or someone who plans to be book blogging in the long run you should get used to not seeing comments on many of your posts. The faster you get used to this reality, the better, that way you won't ever lose drive or enthusiasm for blogging. Instead you should attempt to see this blogging thing as a way to bring benefit to your readers. Once you do that your readers will see the value of your blog and continue to visit thus attracting more traffic to your blog. Maybe even bring readers who comment, but remember. Comments are still not everything. It is the value you bring to others that matters.
About the blogger
A blogger at Book & Movie Dimension a Blog for years. I Cassandra pride myself on finding the next hottest thing in Entertainment wherever it may hide: books, movies, music, you name it. Huge reader, anime watcher, and huge appreciator of TK from Ling tosite sigure music and Ling tosite sigure music.
Follow me on Twitter: BookLoverC.