Karen Kingsbury is a great Christian romance author.  She has written several books (actually series) that revolve around one family: the Baxter family.  This allows the reader to become even more invested in the characters than they normally would.  Below is a listing of the series Kingsbury has written around the Baxter family.

Remdemption:

• Redemption
• Remember
• Return
• Rejoice
• Remember

Firstborn

• Fame
• Forgiven
• Found
• Family
• Forever

Sunrise

• Sunrise
• Summer
• Someday
• Sunset

These series started in 2002, 2005, and 2007 respectively.  Watch out though, if you’re into Christian romance fiction and you start one, you may have to read them all.