's book has some information on legends. The DOC
books, which are now available online, have a lot more information. Grierson
's single volume book Byzantine Coins
has some information, but this is quite limited.
Legends changed quite a lot during the Byzantine
period. Legends were more standardized at first, but the standardization and consistency broke down towards the end. Coins from the Paleologan period are quite variable for example. The legend
might change from die to die, with blundered legends and missing letters.