If you prefer a specific course book, you can let us know up to 1 week before the course starts. We would be happy to note your request and try to fulfill your wish. Please understand that this is not always possible. Therefore, please only purchase the course materials that we have confirmed for the respective course. 👍📚
Please also try to avoid older (or newer) versions of the books we have confirmed to you. Or talk to the teacher at the beginning of the lesson whether your (older or newer) version can be used for the lesson.