Simon Beaufort 
Dead Man’s Secret, A [EPUB ebook] 

The new ‘Sir Geoffrey Mappestone’ mystery — When the former crusader knight Geoffrey Mappestone is ordered by King Henry to deliver a series of mysterious letters to the restless western reaches of Wales, he agrees only reluctantly. His conviction that the simple mission hides something more sinister is strengthened when the letters’ scribe is murdered before the journey begins. Then one of Geoffrey’s travelling companions is killed, and he knows he must uncover the secret behind the letters before more victims are claimed . . .