Last year, on the Internet, foreign compatriots (namely, Alex Galuzin) saw a remarkable book on how to create a map in 11 Days. The thought of reading and translating it into Russian immediately appeared.
Although the book is about UDK and Maya, it is not tied to any engines, but more about the organization of the workflow and the formulation of tasks in the development of the game level.
Links to the author of the book and the translator is in the book. If anyone is interested, they can find everything there. I will be glad to reviews and comments on the book.