please don't use link shorteners, they're 404s waiting to happen: https://www.amazon.com/dp/0451474570 ("Llama Llama Red Pajama Board book – Illustrated, May 5, 2015"; 9780451474575)

It's Amazon's own link shortener. That's the link they give out from the share button. It would be really funny if they drop it. That would maybe some domain snatcher very lucky.

Thanks for posting the full link with description so it's clearer for everybody.

Omg. Great catch!