I discovered the Jessica Darling series about a month ago. I finished the series in a few days. Megan McCafferty's Jessica Darling and Marcus Flutie seem to have found the time for their love in Perfect Fifths, the final novel of the series.
The book doesn't go on sale until April 14th, but you can pre-order now.
Megan McCafferty also has a contest going to give away advanced reader copies of Perfect Fifths.