I really do not recommend to buy the ebook in this web shop. Its the worst UX I have ever seen in an online shop. Normally you would pay and then receive a link to download.

Here it goes like this:

- you receive an email: Please create an account on our website, you will benefit a lot from it

- then another email: If you want to get the book you just payed for, you must register first and then enter this code: #20 digit cryptic string#

- you create an account, eventually successfully bypass the dark pattern to seduce you to accept spam mails from them ("click here if you do not want to receive spam mails from us").

- You log in an see: "No books in your account", where can I enter the 20 digit cryptic code?

- Another look at the mails, oh, they said, "If you want to receive your book, you have to create an account on ANOTHER website

- You create another acccount

- Log in, you see a message: "Please click on the link in your confirmation mail"

- no confirmation mail received

- Go back, click on "send confirmation mail again"

- Some time later, confirmation mail arrives. But just a mail with header and footer but no content, no link to click

- Try again, same result

- Obviously something went wrong, can i report the bug somewhere? Of course not!

I am still waiting for my book.