"You can trick yourself into creating something so grand that you would never have dared to plan such a thing."
Long story short - I'm writing a Geometry textbook. There will be some competition-based/more standard sections, such as Area of a Triangle, but we will explore stranger things such as inversion, homothety, radical axes, the study of matrices, and so on. I hope to have it finished by early March and released by mid-April. We will see as time goes.
A couple of samples of chapters from Exploring Euclidean Geometry.