π Books is one of the animated emoji in Google's Noto Emoji Animation set β the same books emoji (U+1F4DA) drawn as a short looping Lottie animation. Lottie files are vector, so the animation stays sharp at any size and is usually much lighter than a GIF or a video.
π is the books emoji, part of Unicode's Objects group, added in Emoji 0.6 (2010). Unicode's keyword list links it with βbookβ, βeducationβ, βfantasyβ, and βknowledgeβ.

