The Green Book emoji is the picture of a simple closed book in green. Just like all the other book emoji, this one is primarily used in its direct meaning in the context of reading books of different types, and education.
The green book emoji was introduced in 2010 and released as part of the Unicode 11.0 standard. This emoji can be found under the objects
category. Because the green book emoji has been around for quite some time, it should display correctly in the majority of operating systems.