I haven't seen anything that indicates that it is not for a comfortable pillow for a person to use while reading, especially since it includes "every body is different" and not "everybody." Googling "reading pillow" generates results for body and bed rest pillows, so I also lean toward a person pillow rather than an object pillow.
I don't use one and don't have any recommendations. My kids have these really great backrests that are basically huge animal heads with arms. Costco doesn't sell them anymore and I don't know if anyone carries them.
https://www.cochaser.com/blog/plush-animal-back-rest/
(You'd think the noses would get in the way, but my kids -- pre-teen and teenage -- love them.)
That isn't helpful, but I mainly wanted to point out that the OP hasn't been back and we don't have any confirmation regarding what what they are looking for.
