Write a mystery short story with four paragraphs and it be school friendly with 5 sentences in each paragraph

Once upon a time in a quaint little town, there was an old library that the children of Roosevelt Middle School frequented after classes. You see, the library was not just any old library, but one filled with secrets and hidden treasures. The elderly librarian, Mrs. Gardner, always hinted at a certain special book hidden somewhere amongst the dusty shelves that held a great secret. It was said that whoever found the book would uncover a mystery so marvelous, it would change their life forever. Driven by curiosity, a group of students decided to band together and find this mysterious book once and for all.

Every day after school, the members of the secret society that had formed would gather in the library and search the shelves for the elusive book. They left no stone unturned and examined every possible clue, following the riddles left by Mrs. Gardner. From ancient maps to cyphers hidden in the margins of dusty pages, the children learned to decipher secret messages and piece together hints that led them closer and closer to their goal. Each week, they would meet to strategize and share their findings. They had become more than friends, they were a team bonded by their common pursuit of unraveling the library's secret.

Finally, one day, their efforts paid off. One of the youngest members of the group, Tommy, discovered an old, tattered book wedged between two dusty volumes of history. The leather-bound cover was adorned with intricate patterns that glowed faintly, ensnaring the imaginations of the children. They eagerly opened the book and discovered that the pages held the stories of the town's past heroes – written history that had been lost in time. The book revealed the origins of their beloved town, stories of bravery and sacrifice by the humble citizens of past eras, who had fought and protected the town from great dangers.

Filled with inspiration, the children brought their discovery to Mrs. Gardner, their hearts swelling with pride. The aged librarian, in turn, beamed with joy, recognizing that it was time for the next generation to carry on the legacy of the town's hidden heroes. The secret society, now known as the Guardians of the Tale, vowed to take charge of their precious discovery and find ways to solve current dilemmas affecting their town. The knowledge in the book not only brought them closer as friends, but also connected them to the rich history of their community. And so, together, they embarked on a journey to carve their own tales into the pages of their town's history, armed with the mysteries of the past and ready to create a better future for all.