It looks good -- the Reston text is the most recent.
There also the movie I linked to:
Holy warriors
Richard the Lionheart & Saladin / Richard Bedser from 2005
and
This hasn't been mentioned yet:
Lionhearts :
Saladin, Richard I, and the era of the Third Crusade / Geoffrey Regan
1999, 1998 English Book xxv, 254 p. : ill., maps; 24 cm.
New York : Walker, ; ISBN: 0802713548 9780802713544