There is a cruising guide that you might like: "The Sea of Archipelago and the Gulf Of Finland" which has photos, written descriptions and schematic charts of the harbors and cruising grounds of Finland
. The text is in English
, German, and Russian.
I bought mine in Helsinki, but the publisher has a website/store: Satamakirjat :: Lokikirja :: Meripartiolippukunta Turun Partio-Sissit ry
This guide doesn't contain full-featured charts, but it could be pretty useful.