If you liked The Art of Lainey by Paula Stokes, then you might like Going Vintage by Lindsey Leavitt.
Both of these contemporaries feature girls whose relationships end unpleasantly and decide to take some old school inspiration in the aftermath. They meet interesting new characters along the way, as learning something new about themselves as well.
If you liked Legend by Marie Lu, then you might like Article 5 by Kristen Simmons.
These dystopians, although they feature very different societies, follow a boy and a girl with very different roles in their respective governments, and how they grow and learn about each other and their society.
So, there is the third installment in If, Then. I hope you are enjoying this series, as it's an easy way for me to recommend books based on what you might like, and also hear from you in the comments about similar books I might enjoy!
From the paper world,