Venture at MidsummerBook - 1967
Four children spending midsummer in northern Finland undertake a dangerous trip by kayak across the Finnish border and into Russia, in order to find some valuable plants left in Karelia when it was Finnish territory.
Publisher: New York : Holt, Rinehart and Winston, 
Edition: 1st ed
Characteristics: 181 p. : map, music ; 21 cm