Now, that was an idea Oliver could get behind. He wasn't the biggest reader either, but if he knew without a doubt that he would go back home and continue to play Quidditch... for years, or decades, it doesn't matter, he would at least know. And if he went back and couldn't play Quidditch, for whatever reason, the books would know that too. Of course, Oliver might think that the books might be wrong, that whatever history he had ahead of him might be changed by his actions here, but if that were the case, parents learning about their childrens' lives could affect them, and that hadn't seemed to have happened yet. No, this was the right idea, and Oliver rose when Tonks did, eager for the first time in his life about going to the library so he could put this question to rest once and for all.
And if the library was where Tonks went to snog people, so much the better.