A little show-off of part of my collection to bring to the light this niche stuff, hoping to gather infos on them.
I know there are around 40ish(?) books and the Nagatanien cards were found in Bento/Noodles in Japan, if you know something more please feel free to share it^^
Books:
Nagatanien:
Nice topic. I’m always happy to see more items like these since discovering the Rhyhorn novel but not finding anywhere near enough about them. 
Zapdos’ pose is a neat example of viewing an animalistic maturity over a dynamic pose.
Uuuh the Rhyhorn book was illustrated by Arita right? I need that one.
I wish to see more of it and others. Rhyhorn is undervalued in my book.