Tessa makes a big thing about going Commando. However, as soon as she's back in her Hotel Suite and Hardin shows up is very clear that Tessa has a Bra on and there's a sneaky view of Gold Knickers - hardly Commando.
When Tessa is given a Kindle as a present she turns it on and looks through the titles already downloaded. She touches the screen to move through the titles of books on the device. Kindles do not work in this way, a touch of the screen advances the page, Tessa is effectively reading a book consisting of the title pages and artwork of the books, not the books themselves. This is almost certainly done to make the story easier to follow on screen, rather than by reading the small titles as a Kindle really presents books.
When Tessa reads the card written by Hardin that came with her Kindle, it says favorite rather than favourite which is what an English person would write.