Are the books you read similar in subject to the blog posts you read? I bet they are not.

To me it sounds like you are bored or tired of reading about the same material. It's burnout really. It might be the simple that there isn't much new or interesting material in your area of interest and most blog posts are rehashing the same info you already know.

Taking a break is fine. Maybe its time to explore hobbies you've been interested in perusing but have not yet had the time.