This was posted to YALSA BK
Lynn Carpenter, Ann-Marie Marchant, Gwen Lehman, Gillian Dawson, Trish Underwood, Emily Cassady, Katie Spofford, Kelly Burden, and Diana Sanabria provided the following suggestions:

Say Goodnight, Gracie by Julie Reece Deaver
Life As We Knew It
The Dead & Gone by Susan Beth Pfeffer
A Walk To Remember by Nicolas Sparks
Socrates in Love by Kyoichi Katayama (in manga & novel form)
Hard Love by Ellen Wittlinger
Black Box by Julie Schumacher
If You Come Softly
Behind You by Jacqueline Wilson
Lurlene McDaniel
Sarah Dessen titles
Jodi Picoult titles

Which supplemented my original list:

The Diary of Pelly D. by L.J. Adlington
th1rteen r3asons why by Jay Asher
Jars of Glass by Brad Barkley
Deadline by Chris Crutcher
Before I Die by Jenny Downham
Tears of Tiger by Sharon M. Draper
Forever Changes by Brendan Halprin
Time for Dancing by Davida Hurwin
In My Hands: Memories of a Holocaust Rescuer by Irene Gut Opdyke
Cures for Heartbreak by Margo Rabb
Going for the Record by Julie Swanson
Trouble by Gary Schmidt
Skin by Adrienne Vrettos

which was, itself, supplemented by:

ALA’s Popular Paperbacks List: //Read 'Em And Weep// (2005)
Updated 03/04/09