Bloodsword is a series of 5 gamebooks set in Legend that can be played solo or with friends (up to 4 characters can run through the books at once). There is some debate as to how 'canon' these books are, as they tend towards higher fantasy than the rest of Legend. However, regardless of how directly they can be translated into the Dragon Warriors RPG, these books can be mined for background on Krarth and plenty of flavour. Dave Morris also novelised these books in a trilogy known as the Chronicles of the Magi.
Take a look at the Bloodsword books