What is a blog?

The differences between a blog and a book are many. One of them is the liberty with which blogs are written and the confinements of writing a book. Another difference is the actual way in which these are written; while a blog often ignores many grammatical rules and tendencies and is free to roam without restriction, a book must always be grammatically correct and doesnt posses the same freedom in writing as a blog.
When blogs first came out, bloggers didn't offer much commentary but rather posted links to websites they liked, a sort of filter for what to read. Now a days, bloggers offer a lot of commentary on their subject, whether it is criticism, acclaim, disgrace, etc.
The purpose of reading a blog is to find commentary about a specific topic in which you are interested. You might read a blog to find out whether a book is worth reading or whether a movie is worth watching.
You might question a blog's objectivity because of its simple nature. You don't know who wrote it or whether they are knowledgeable about what they are blogging about. Also, blogs in their nature are subjective.
There are many blogs around the world which discuss our summer reading. I set out to find blogs that talked about George Orwell's 1984, Anthony Burgess' A Clockwork Orange, and Dante's Inferno.