"In addition": how do you spell?

This article will tell you about the correct spelling of the word "besides". How do you spell it?

"In addition" - this is a real adverbial pretext inRussian, and it should be written together. We should not write this word separately. Wrong to write: "past", "pamomo", "pomima", etc. The correct option is only one: besides. An example of use: "In addition to information from lectures, in preparation for the Exocumen you will also need textbooks."