Wow, the 'Evernight' saga by Claudia Gray is wonderfully simple to follow — there's no tangled prequel labyrinth here. Read them in publication order and you'll follow the story as intended: 'Evernight' (book 1), then 'Stargazer' (book 2), followed by 'Hourglass' (book 3), and finally 'Afterlife' (book 4).
I like this order because each novel builds on the last, both emotionally and plot-wise. 'Evernight' introduces the boarding school and its rules, 'Stargazer' expands the world and raises the stakes, 'Hourglass' flips perspectives and deepens character choices, and 'Afterlife' wraps up the arc. If you're picking up a boxed set or grabbing e-books, stick to this flow for the best pacing and to avoid spoilers. Personally, rereading them in that same order felt like walking through the seasons of a relationship — bittersweet and utterly satisfying.