It smells horrible and looks disgusting, but rubbish hasn't always been a problem. Some of it can even be useful. Squelch through its intriguing story, past ancient animal droppings, stinking sewers and dirty nappies. Just remember to hold your nose along the way.Series Two titles are for children who are reading more confidently, and are 64 pages (2000-2500 words) in length. They use varied sentence lengths, more complex sentence structure and more challenging vocabulary.Most Series Two books contain a single narrative divided into chapters. Subjects include classic tales and myths, mystery stories and non-fiction.