books not syncing to my ipad

I remember having this issue with audiobooks when Ipad os 13 came out but I don't remember what I did to solve it. Now I'm having the same issue with books. I go to finder > my ipad > Books. Everything I want transferred is selected .. but nothing syncs over.

I've tried rebooting the macbook pro, rebooting my ipad, using different cable, plugging into the different usb ports. I've also tried, on my mac, finder > go > home > get info > the selecting "apply to closed items" in the bottom selection options. On my ipad I've also went to settings > my name > icloud > the turning off and then back on "books."

Can someone please help? Ipad OS 13.4.1 along with the latest addition of Catalina on my 2015 macbook pro.

thank you!