Hi there, I am Dr. Deepak, I work in Emergency Department, where I see many patients with injury to their head. As you mentioned you had injured your head on bed, and later you got hit by the book. Now your head hurt really bad. I feel you had sustained minor injury to your head even though your head hurts really bad, I can say that as 1. You didn t had any dizzy feeling. 2. You didn t had vomiting even though you had nausea. 3. You didn t loose consciousness. 4. You are not feeling any numbness or weakness of any one side of your body 5. You are not having any bluish discoloration around your eyes and behind the ear 6. You are not having any trouble with walking. And the most important thing is you are pretty much okay right now. If you face any of the above mentioned problem within 24-48 hrs, then you can show to the Doctor, who can examine you. For the time being you can apply some ice pack over the injured area, take some pain killer for the pain and take rest for some time. If the headache persist for more than 48 hrs then you should a doctors for further treatment. Thank you Hope your concern was dealt with and hope you have a speedy recovery.