Ralph Connor 
Sky Pilot in No Man’s Land [EPUB ebook] 

Excerpt: "High upon a rock, poised like a bird for flight, stark naked, his satin skin shining like gold and silver in the rising sun, stood a youth, tall, slim of body, not fully developed but with muscles promising, in their faultless, gently swelling outline, strength and suppleness to an unusual degree. Gazing down into the pool formed by an eddy of the river twenty feet below him, he stood as if calculating the distance, his profile turned toward the man who had just emerged from the bushes and was standing on the sandy strand of the river, paddle in hand, looking up at him with an expression of wonder and delight in his eyes."