Reading books requires patience and concentration and increases one’s attention span. It also allows the reader to spend more time thinking deeply about a concept. If too many books are read at once, however, it becomes harder to digest the information drawn from books and less is absorbed. More of a book will be comprehended and read if one only reads 2-3 books at a time. In order to really read a book, more is required than just reading it. The ideas may also need to be meditated upon and analyzed. This requires time to focus on it before moving on to the next topic. Too many books can result in information overload where you do not have capacity to absorb and think about all the ideas at once.
Other disadvantages can come from the fact that you spend a lot of time sitting down and reading too often can strain your eyes if done in poor light. Because of this, although reading is good, it is best done in moderation both for physical health reasons and for an optimum reading experience.