The case of the Taken Teddy - Book 1 of Sister Sleuths

In a big city lived two sisters, Ahana and Helena. Ahana was 10 years old, and Helena was 5 years old. Ahana loved to solve mysteries around town. Helena’s favorite thing in the world was her teddy, Teddify. One morning, Ahana woke to the sound of her little sister crying, 'Ahana, do you know where Teddify is?'