A Blizzard representative confirmed to Polygon the publication of an Overwatch book entitled "The Hero of Numbani" on May 5, 2020. The story will focus on Efi Oladele, the young girl who created Orisa. Other characters from the game will also appear in this novel, including Lúcio and Doomfist.
Remember, it was after Doomfist's attack through the city of Numbani that the idea of designing Orisa was born in the mind of Efi Oladele. Indeed, many OR15 security robots were destroyed during the attack and it is from their remains that Efi designed Orisa.
Author Nicky Drayden was commissioned to write this first-ever Overwatch novel. You may already know her from her book "The Prey of Gods", which won no less than 7 awards in 2017.
You can already find on Amazon a very complete summary of his upcoming book "The Hero of Numbani":