- Series: United Shifter Force Series Record # 53096
- Series Tags: paranormal romance (27), werewolf (23), shapechangers (1)
- United Shifter Force
- Heart of the Wolf
- 1 Heart of the Wolf (2008) by Terry Spear
- 2 Destiny of the Wolf (2009) by Terry Spear
- 3 To Tempt the Wolf (2009) by Terry Spear
- 4 Legend of the White Wolf (2010) by Terry Spear
- 5 Seduced by the Wolf (2010) by Terry Spear
- 6 Wolf Fever (2010) by Terry Spear
- 7 Heart of the Highland Wolf (2011) by Terry Spear
- 8 Dreaming of the Wolf (2011) by Terry Spear
- 9 A SEAL in Wolf's Clothing (2012) by Terry Spear
- 10 A Howl for a Highlander (2013) by Terry Spear
- 11 A Highland Werewolf Wedding (2013) by Terry Spear
- 12 A SEAL Wolf Christmas (2013) by Terry Spear
- 13 Silence of the Wolf (2014) by Terry Spear
- 14 Hero of a Highland Wolf (2014) by Terry Spear
- 15 A Highland Wolf Christmas (2014) by Terry Spear
- 16 SEAL Wolf Hunting (2015) by Terry Spear
- 17 A Silver Wolf Christmas (2015) by Terry Spear
- 18 SEAL Wolf in Too Deep (2016) by Terry Spear
- 19 Alpha Wolf Need Not Apply (2016) by Terry Spear
- 20 Between a Wolf and a Hard Place (2017) by Terry Spear
- 21 SEAL Wolf Undercover (2017) by Terry Spear
- 22 All's Fair in Love and Wolf (2018) by Terry Spear
- 23 SEAL Wolf Surrender (2019) by Terry Spear
- 24 Silver Town Wolf: Home for the Holidays (2019) by Terry Spear
- 25 The Wolf Wore Plaid (2021) by Terry Spear
- Day of the Wolf (2019) [SF] by Terry Spear
- Night of the Wolf (2021) [SF] by Terry Spear
- Tangling with the Wolf (2021) [SF] by Terry Spear
- SEAL Wolf Pursuit (2021) [SF] by Terry Spear
- Day of the Wolf: The Novellas (2021) [C] by Terry Spear
- Heart of the Shifter (Terry Spear)
- 1 You Had Me at Jaguar (2019) by Terry Spear
- Heart of the Wolf