A novel series consists of multiple books that are interconnected, often featuring the same characters, settings, or overarching plots. These series allow authors to explore storylines in greater depth and give readers the opportunity to become invested in the characters and their journeys over time. Series can vary in length, with some containing only a few installments and others spanning dozens of books. In children's literature, novel series often cater to various age groups and can encompass various genres, from fantasy to mystery.