This is a digital illustration for a book cover. This is the second book in the Northern Arcadia series by Cat Turner, Thief in Long Shadow.
This is a scene where 4 people and their robotic horse stumble upon a pile of riches. The main character is enthralled with the riches, but the others look onward towards something of greater value. The shadows of all 5 characters extend outward to create a silhouette of a hand.
You can purchase an e-Book version of this story from Amazon.