Try the custom AI to help you find products that Reddit loves.
That would definitely be the third volume of the Battle Tendency JoJoniums, here's a link to it on Amazon, assuming you want it in English assuming she's caught up to that volume it should be the perfect choice.
The wammu drawing is taken from the back of the re-release of part 2 , with new cover art by him heres the amazon link. And checking online its says the re-release was made in 2014 in japan and 2015 with english text, so this wammu picture is definitely recent and has his part 8 artstyle considering JoJolion came out in 2011. So yeah it's really weird to see wamuu like this, if you want an even weird out here's all the jojos in his part 8 style in a group shot