They published another version with a longer list of authors. They published this one under three authors since that’s the maximum number you can split a Nobel prize between. Doesn’t necessarily mean it’s the real deal, but it means that the researchers sure think it is.

I import them into the native books app and it’s good enough that I haven’t had a reason to look elsewhere. You might need to sync with a Mac for this to be an option though—I’m not sure if it can be done without the accompanying MacOS books app.