Book of Reform -- safety question :)

Switching my summoner from a CI build to a life one, so I want to change my normal bandits reward to 40 HP. Just to make sure that I don't blow 20 regrets on the wrong book:

The book I want to get the 40 HP is the one that "gains Oak's favor", right? (20 regrets + amber amulet)

Yes.

Thanks, appreciate it!