We add books to our library after concluding an agreement with the publisher or the right-holder. Unfortunately, we can't say exactly when we sign the contract with this or that particular publisher.
When the contract with the right-holder expires, the access to the book will be blocked. In that case we won't be able to add the book to our library until the contract is renewed.
But you don't necessarily have to wait till the book is added to our library: you can search for the book you’re interested in on the Internet (in FB2 or EPUB) and upload it at the website or in the app. Click here for more details.