You might find that people looking for information (educational content) and people who come to buy, do it at different times of the day.
Have your content management software change the featured content and also the specific content shown for specific URLs, based on the probable intent of the visitor. For instance, if you have an article on how to be an early riser, you should have two versions of it (but with only one URL). One version – the one for information seekers – is more educational and tries to win the trust and appreciation of the reader and has a “join our email” list call to action, while the other one is more sales oriented with a different – “buy now” – call to action.
Encourage people to buy on the first day of availability (or pre-order), and make these into a collector’s item.
Print special dust covers that only those who buy the book on the first day get.
Can also be done with other products like games, playing cards, toys, etc.