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Nope, not unless you use a character editor. If you can increase your intelligence, you can add more to the book though.

if you use shadowkeeper (character editor) i think you can remove spells and add which ever one you want.

The way to do it without cheating is to take a potion that temporarily raises your intelligence. Have your scrolls ready to learn, and you both have more spaces to fill and a better chance to learn them.