Nigel Tranter 
Right Royal Friend 

When James the Sixth, His Grace of Scotland, also becomes His Majesty of England, far-reaching changes take place in the two realms.David Murray, the young son of Sir Andrew, a Perthshire laird, has no aspirationsto greatness. Then a chance encounter with King James the Sixth leads to him becoming Cup Bearer and Master of the Horse to his young liege. Together with James’s foster brother John Erskine, Master of Mar, the three men enter a new era of political intrigue and dynastic manoeuvring.