This is an amaxing book, a thirty years story unfolds in this book. However the number of game sessions you may play with it is only limited as you want. Even though the book tells a main story, every year of these 30 years the writers were very kind to write everything which is going on around the Wilderland. Even though you might focus on the main story, you will finding yourself more and more interested on the side stories aswell. Be prepared to play for many fictional and real years of you life with this fenomenal book.