A literary pastiche mimics the style or theme of another work, somtimes lifting quotes and characters directly. Often, a single style or theme will be the focus. For example, an English teacher I had in high school gave the class a pastiche on writing a pastiche in the style of Waiting for Godot. Shakespearian plays often lend themselves well to the writing of a pastiche. The addition of humor is optional, but can be quite a lot of fun.