Ron and hermione are jealous of harry potter family magic fanfiction

I remember fuck all about this story unfortunately so I doubt anybody will find it, but I recall one where somewhere between 4th and 6th year, Harry gets access to a Grimoire of Potter family spells and, naturally as another link to his family, Harry is quite protective of them, which leads to this really interesting dispute and I think a falling out between Harry and Ron (who might have also had his own Weasley magic) vs Hermione because she’s a big believer that knowledge should be available to all and wants Harry to share the Grimoire with her and publish it.