ToME: the Tales of Maj'Eyal

Hello im just finish a game and want to buy DLC, can somebody tell me what im receive from DLC, what files exacly ? I want to know it before buy, what kind of files ill receive when i pay, some graphics,music files,binaries,source files ? which ones ill get ?

You will get a .teaac file, which is a zip file.
It consists of .lua, .png and .ogg files.

Maybe you want to check this page for a description of the DLC content?
http://te4.org/dlc/ashes-urhrok