Love the series? Want more? You can grab the boxed sets and save a bit of $. 
Books 1-3
A Knight to Remember
Knight Moves
Lonely is the Knight
Available At:
Audiobook:
Books 4-6
Darkest Knight
Forever Knight
First Knight
Available At:
Books 7-10
Last Knight
My One and Only Knight
Beyond Time
Time After Time
Available At:
Apple Books
Kobo
Google Play
Nook
Amazon
Amazon CA
Amazon AU
Amazon UK
Books 11-13
A Moonlit Knight
The Knight Before Christmas
Falling Through Time
Available At:
Apple Books
Kobo
Google Play
Nook
Amazon
Books 14-16
One More Knight
A Knight in Tarnished Armor
Christmas Knight
Available At:
Books 1-7
A Knight to Remember
Knight Moves
Lonely is the Knight
Darkest Knight
Forever Knight
First Knight
Last Knight
Available At:
Nook
Books 8-13
My One and Only Knight
Beyond Time
Time After Time
A Moonlit Knight
The Knight Before Christmas
Falling Through Time
Available At:
Apple Books
Kobo
Google Play
Nook
Amazon