He's stupid as fuck, jfc, 17 intelligence my ass, if you barely reach 10 is a lot, jesus, why just not suggesting the girl to begin with to swap classes or something, or at least swap her gear, she's clearly useless the way she's doing things, cmon, this dude is supposed to be a nerd who can beat any game in any difficulty with any restriction, and he can't even help optimise his very own partner?
Also, trusting the book for every single thing is stupid as well, man, think for yourself for five minutes instead or let the book be the MC... Not saying he should be the mixture of the greatest minds of the world, but just a bit of common sense doesn't hurt anybody, trying to be an adventurer just after using one spell and killing one goblin... man, this is getting disappointing after the interesting start in CH1