if anyone's interested in wave, I can recomend "Exploring the Monster" by Robert F Whelan, about the Sierra Wave Project in the early 1950's
see more here:
http://www.greeleynet.com/~rfwhelan/monster.html
It tells of gliders using wave to soar to 44,000 feet - higher than many aircraft of that era; and also the story of how the lift was powerful enough to allow a P-38 to climb with both engines off...! It's absolutely fascinating!
nb. The world gliding altitude record is currently 49,000 feet (14,938m) set in the Sierra Nevada mountain range), however Steve Fossett and the Perlan project hope to break this
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