You%20are%20a%20mountain%20climber%2C%20headed%20to%20the%20Himalayas%20to%20find%20proof%20that%20the%20mysterious%20yeti%20really%20exists.%20When%20your%20best%20friend%20Carlos%20goes%20missing%20from%20base%20camp%2C%20the%20fate%20of%20the%20expedition%20is%20in%20your%20hands.%20Are%20the%20yeti%20out%20there%2C%20among%20the%20dangerous%20crevasses%20and%20icefalls%3F%20Is%20Carlos%20in%20trouble%3F%20A%20monsoon%20is%20moving%20in%2C%20and%20you%20must%20decide%20the%20next%20course%20of%20action%20quickly!By%20R.A.%20MontgomeryReading%20Level%3A%20Grade%205