The Big Open Source Math Book (BOSMB) is a compilation of all of the lesson plans I've ever written as a teacher of high school mathematics, and hten some.
Each lesson plan is contained within its own folder. There is one master file that uses the combine package that will collect each one of these lessons into a silgle file.
I need to proof read each file so that it's not as specific to my class as it is. I also aim to rewrite all of the diagrams so that they're no longer image files, but drawn with tikz.
The last thing I need to do is create more chapter sections for things that I glossed over or used other resouces for teaching (mostly graphing). This way it will be an all inclusive book without the need for any other.