If you are a bookstore or distributor and are not yet a Santillana customer, you can request your registration through the customer registration form on the website www.clientes.santillana.es. 

If you are already a customer, go to www.clientes.santillana.es, click on “Register” to request your username and access key. You will need to fill out a short form, and afterward, you will receive your access key.