Read Bottom Up by Neel Shah and Skye Chatham (2015)

Lovely, unique novel written in email and text from the perspective of two characters meeting and falling in love. And then struggling in the relationship.

Shah wrote Elliot's perspective and Chatham wrote Madeleine's as well as their conversations with their best friends. This lends the novel a unique authenticity and reality.

Charming and very relatable. Unfortunately, the only book written by these two together. :(