Minecraft limit to book reading

Solution 1:

You can't.
But you can make it so when they reach 10 XP levels, the empty book in their inventory (make it so it was originally empty) is replaced with a written book like this:

• Place a command block with a redstone comparator coming out of it, with the command /testfor @p[lm=10] This will test if the closest player to the command block has 10 XP levels. If they do, a signal will be sent through the redstone comparator to...
• Place another command block in the direction the redstone comparator is facing. This will be the command block that gives the player the book. You can add another command block here too if you want to clear an empty book from the player's inventory. The /give command for the book is: /give KingBspd written_book 1 0 {title:"Book name",author:"Your name",pages:["{text:\"John woke up\nJhon went to work\"}"]}, but you can find more info on that online.

If you need any additional help, leave a comment.