Let's get this list straight, because I've seen some messed up orders online. It starts with 'Songs of the Humpback Whale' from 1992, then 'Harvesting the Heart' (1994), 'Picture Perfect' (1995). After that, 'Mercy' (1996), 'The Pact' (1998), 'Keeping Faith' (1999). The 2000s kick off with 'Plain Truth' (2000), 'Salem Falls' (2001), 'Perfect Match' (2002), 'Second Glance' (2003), 'My Sister's Keeper' (2004). Then 'Vanishing Acts' (2005), 'The Tenth Circle' (2006), 'Nineteen Minutes' (2007), 'Change of Heart' (2008), 'Handle with Care' (2009). Next is 'House Rules' (2010), 'Sing You Home' (2011), 'Lone Wolf' (2012), 'The Storyteller' (2013), 'Leaving Time' (2014). She co-wrote 'Between the Lines' with Samantha van Leer (2012) and 'Off the Page' (2015), which are YA and fit in there. Then 'Small Great Things' (2016), 'A Spark of Light' (2018), 'The Book of Two Ways' (2020). Her most recent novels are 'Wish You Were Here' (2021) and 'Mad Honey' (2022) co-written with Jennifer Finney Boylan. She also has a few early out-of-print titles and short story collections, but this is the core novel list in order.
Whew, that's a lot of typing. Hope it helps someone out there who's trying to collect them all chronologically.