I need someone to help me draft book-level professional writing about the subscription business model. You need to have excellent writing skills (publish level) and a certain level of understanding of the subscription business model, along with outstanding research ability. This writing is positioned at the middle and advanced levels. It needs to touch on the history, and current situation of the subscription model deeply analyze the changes brought by the subscription model to modern businesses and our daily lives; it also needs to analyze some successful and failed cases. This is a 3-month project, and I hope you will seriously consider whether you can fully commit to it and deliver a manuscript that meets the requirements.