The info for says it's a game prize. Where is it from? I really want to get it but 63 million is a bit too steep so I'd rather just try to get it wherever it's from. Thanks.

reading drive 2013, which means it's in the antique shop. They sell for 12M.

It's 12,375,000 sP in the Reading Drive section of the Antique Shop. If you go to the Book section you can pay 6,187,500 sP and it will 'read' it directly to your active pet.

And a tip for finding item origins, if you hover over it and click "search shops", if its from a site shop it will tell you where at the top ☺

Thank you for the help, everyone! :)

what said usually works, but items like that which generate a special notice in Search Shops are all added in by hand. This means there are sometimes mistakes and omissions. Double checking here or in the fansite SubetaLodge is still worthwhile and can help you save sP.