If you have the eBooklets module you can include a dynamic 'Add to eBooklet' link within your style using the following Style Element:
<%= StyleElement("PdfBasketAddRemove", "addlabel=Add to My Basket;removelabel=Remove from My Basket") %>
Parameters
You can customise this element using the following parameters:
addlabel={add to basket link text}
Displays your preferred text if the current page has not been added to the users eBooklet
removelabel={remove from basket link text}
Displays your preferred text if the current page has been added to the users eBooklet
