I specifically joined wordpress to follow/ read a particular blog. However, I have not found anywhere on the site which allows me to type in the author’s name. The “theme” / category thing is NOT helpful.
There is no such search access as it’s the subject matter in the blog that’s relevant. The WordPress.com search engine indexes post, pages, and comments content (body text). Unless entered as text in those contents, blog name, post titles, and post/comment author names are not indexed. http://en.support.wordpress.com/wordpresscom-search/