I bought en ebook, which opens only in digital editions software. The book had been purchased about 10 years ago. I'd been using that ebook, sort of not much, but there is a need arising to learn technical concepts covered in that book.
Moreover, I cannot login to the email account, with which I purchased the ebook. My phone number for authentication, into the email website has been lost and sign in is impossible.
I want to use the ebook in 2 computers (one desktop and one laptop). Please help.
