Response to Desk Crit:
I added a cooler temperature to the back cover so that it would better match the front. The center spread needed the most work, I sized down the "essentials" image & added a slight drop shadow, enlarged the type, added hierarchy in the type, and skewed the background (brick wall) so that it was in perspective with the image on top of it. I edited the quote on the 14 by 14 spread and kerned the letters. Lastly I printed this mock up larger to get a better sense of scale.