u/Asleep-Job7120

I've tried finding pictures of the cover but i haven't yet but around 10-15 years ago when i was younger there were these unicorn books i always loved at the local library but I've never been able to find them outside of that and eventually they weren't at the library either. I can't remeber the title or author but they had beautiful detailed covers of unicorn and Pegasus and like each book was about a different story with a different mystical horse. idk if this help but there were also these field mice with almost horse tails with beads in them. and at the back of the book was a website that was like a gamified version of the books. please let me know if you know of anything or maybe something that might lead me on the right track!