Certainly, I'd be happy to.
The ePassport is an increased and enhanced level of security in the book itself, with the chip that is embedded in the back cover. The chip includes the information that is found on page 2 of the book, including the photograph.
So biographic information and the photograph are stored inside the chip. The additional security that this provides for border agents is that they can access the chip, take a look at the information, and ensure that it is in fact exactly what you would expect to see in the book on the second page. With the individual standing there in front of them, they have a third point of reference: the individual, the photo, and the photo on the chip. That would provide the additional levels of security. That's what the e-chip is about.
As to the book itself, if you don't have a new ePassport yet, your current book has on the visa pages a number of maple leaves in sequence through every single page. The new book has vignettes on every single double set of pages.
If I may have your indulgence for a second, you can see, where I am pointing, the ultraviolet features on the pages themselves. Every single page has embedded visible and invisible security features that provide additional layers of security that you won't find in the types of security features that are in the current book.