LaTeX is document markup system (similar to the popular Markdown) that's popular among high-level academia and mathematics authors. iBooks Author 2, which was released during Apple's big event, now supports the LaTeX protocol. It works through the MathML markup language, which a lot of educational textbooks often use for marking up and displaying complex mathematical equations and formulas.
In other words, iBooks Author has gained significant functionality for working together with a markup language already used
