The Arrow of Time is a concept that refers to the perceived direction of time, which is always moving forward. It is an idea that has been explored by many philosophers and scientists over the centuries, and is closely related to the concept of entropy. This book will explore the concept
From Wikipedia
An arrow is a fin-stabilized projectile launched by a bow. A typical arrow usually consists of a long, stiff, straight shaft with a weighty arrowhead attached to the front end, multiple fin-like stabilizers called fletchings mounted near the rear, and a slot at the rear end called a nock for engaging the bowstring. A container or bag carrying additional arrows for convenient reloading is called a quiver.