Stat increasing books

Think of some books that would increase SANDWICH parameters permanently when they're read. Be sure to include an INT requirement.

Do we want these books to have realistic names, made up names, or does it not matter?

If we want realistic names, we could totally do like "Hand-to-hand Combat for Dummies", and the INT could be like +1. Haha. That's silly, I know, but you get the idea. :p

Or we could have a bit more fantasy-related book names, like:
Bertie's Guide To Botony - INT required is +4. Increases ... INT maybe? Or HRT?

Here are my ideas so far, I would like more:

Pugilism Illustrated: +1 to STR. Requires 2 INT.
Fitness Guide: +1 to DUR. Requires 2 INT.
Speak With Distinction: +1 to CHA. Requires 4 INT.
Tragic Tale: +1 to HRT. Requires 4 INT.

"Combat in depth" +1 str, hrt. Wis 6 required...

Let's make "Combat in Depth" a +1 in STR, AGI, NRV, and DUR, but it requires at least a 4 in all of those stats as well as an INT level of 4 in order to be read. Does that sound good?

Rather big boost in stats should cost a decent intelligence. I'd say 6 is on the dot to use it. I think the better the stat increase, the more INT you need. Kinda like you you need some math 30 to go onto quantum physics...

So it would be a plus 1 in the four stats but requires a minimum 5 in each, then requires 6 INT.