I have used the mdf bottles wording labels and the locking box for my project.
I did use texture around the spine of the book just to show that it is possible and that the book still bends. All I would say is keep checking as the texture drys.
I used texture paste and a needle to scrape the edges of the book to make it look like book pages. I think decorating these book boxes is going to become a passion lol.
You can find Samantha's MDF and other items HERE and of course on the SamanthaK site.
These boxes were a sell out on the show but they will be available again in Sams shop so I'll keep you posted. More to come xx