Adding an alternative email address will give you access to your alerts on eBooks or a different email address if needed.
Navigate to the top right hand corner of your profile.
Once on this page, click 'Edit' also on the top right hand corner, which will take you to a list of preferences, including changing your name, job title and email settings.
Here, you're able to add an alternative email, which will enable you to send a copy of your alerts to a secondary email address. You have the option to send alerts to either or both email addresses.