finding a book

[big-h]

I was reading a book about the Holy Wars at the time of Richard Plantaginate. Richard the Lion Heart leading a crusade to the Holy Land. His army included Knights of the Templar.
I have left the book unfinished on a plane in the Far East and wish to purchase another copy to finish reading it.

I purchased the book at Heathrow airport in W H Smith. Not sure of the title or author. Help! Please.

[Unevenmeeyore]

Was it
Lionheart by Sharon Kay Penman?
Or Robyn Young's Brenthren series