Who was/What is book series - 5 books

Who was/What is book series - 5 books Check Photos to see which books are part of this set. The books are in very good condition, except for slight creasing and minor wear. Please check photos. Bill Gates has slight scratching on the left binding of the book. Milton Bradley has a slight crease and fold on the top right corner of the book. Jeff Kinney has slight fold at top right corner. You can bundle with other items to save more. Kids, educational, learning, history