Something about Kievan Rus', but not muscovite versions - Golden Horde that destroyed Novgorod Republic - most northern state related to Kievan Rus'. In the period of Ivan the Terrible(Moscow), big part of Novgorod's population was exterminated.

The most authoritative current work is:

• Wladyslaw Duczko, Viking Rus: Studies on the Presence of Scandinavians in Eastern Europe (2004).

The cost is pretty prohibitive (a used copy on Amazon is $221), but your library should be able to get it for you without a problem. A slightly more cost-effective book, which has contributions from a number of highly regarded scholars:

• Anton Englert and Athena Trakadas, eds., Wulfstan’s Voyage: The Baltic Sea Region in the Early Viking Age as Seen from Shipboard (2009).

And finally a reasonably priced Penguin paperback that gives some very interesting impressions of that part of the Baltic. I'd recommend buying this one for yourself:

• Paul Lunde and Caroline Stone, eds., Ibn Fadlan and the Land of Darkness: Arab Travellers in the Far North (2012).