A group project by Sam White, Toby Palfryman, and myself, where we were set the task to change the world in four days.
Each page has a task for the reader to complete including simple things such as 'make someone a cup of tea'. when the reader has completed the task they write what they did, and where possible, get a signature of the reciprocate. When they have completed the booklet, they returned the booklet to us via our pigeon holes at university.
So far we have had two back. :)