Can't help you at all on Eastern Front operations although "Unternehmen Zeppelin" (a failed attempt to infiltrate agents to kill Stalin) generally features in books on KG 200. Geoffrey Thomas and Barry Ketley did the best English-language one a couple of years ago:
KG 200-The Luftwaffe's Most Secret Unit (Hikoki).
I just took a look at
http://www.kg200.org/historyac1.html which Ross linked to but it seems to repeat a lot of misconceptions and legends - e.g. the author seems to think that III./KG 200 never became operational (wrong!).