One topic you can find on a lot of blogs is books. Bloggers review books, talk about books, and market books. The subject of books is an ideal one for blogs since most people who read blogs probably read books and a lot of the bloggers actually write books.
For an author, their blog is an ideal place to allow readers to get to know them and something about the books they write. The author can update fans and fellow authors on the progress of their writing and events in which they might be participating. Authors can use the blog as a free method of promoting their work and letting visitors know about other books they have available. Caution should be used not to overdo self-promoting on a blog, but creating an awareness should be expected.
There are also book blogs--bloggers who review books of all kinds, interview authors, participate in book giveaways, and other bookish topics. The book bloggers are important to authors who need to let readers know about the books they've written and to help the readers find books that might interest them to read.
If you're interested in becoming a book blogger, don't worry too much about over-saturating the blogosphere as there is always room for more and it's highly unlikely there will be too many of these types of blogs anytime in the near future if ever.
One who is interested in book blogging might also consider a niche market such as children's books, science fiction, self-help and motivation, Christian, or any number of other genres in which many books continue to appear.
Free books and the prestige of being a book critic! Sounds like a wonderful blogging idea for someone who enjoys reading and discussing what they've read.
Do you leave reviews on places like Amazon and GoodReads? Are there some book bloggers that you'd like to recommend? Can you think of some other "B" topics that one might blog about?
Here are some book bloggers: