Final answer:
The 'Teyvat Travel Guide' is a collection of books within the video game Genshin Impact, authored by the character Alice. The series contains several volumes which detail different regions of the game's world.
Step-by-step explanation:
The Teyvat Travel Guide is a fictional series of books within the popular video game Genshin Impact. In the game, these guides are written by the character Alice, who is the mother of the character Klee. The books serve as a resource for players to learn more about the various in-game regions within the world of Teyvat. To date, there are a couple of volumes available in the game that players can collect, each detailing a different area such as Mondstadt and Liyue.