Dragon Knights, Border Lair. Book 2 in the series. This book can be read alone, but is better if you start with the prequel The Dragon Healer or Book 1 Maiden Flight.  This book follows Belora's, Maiden Flight, mother Adora who has been reunited with her childhood friend and adopted mother Kelzy the dragon.  Adora finds love with her 2 Knights and there Dragon Partners.  The broad story line continues to unfold at a nice pace.  After reading this book, I was engaged enough in the story that I picked up the rest of the series to date, Keeper of the Flame.