3 critically acclaimed novels from one of the fathers of military SF, Gordon R. Dickson.
TACTICS OF MISTAKE
It's obvious that Cletus Graeme - limping, mild-mannered scholarly - doesn't belong on a battling field, but instead at a desk working on his fourth book on battle strategy and tactics. But Bakhalla has more battlefields than libraries, and Graeme sees his small force of Dorsai - soldiers of fortune - -as the perfect opportunity to test his theories. But if his theories or his belief in the Dorsai lead him astray, he's a dead man.
A time storm has devastated the Earth, and only a small fraction of humankind remains. From the rubble, three survivors form an unlikely alliance: a young man, a young woman, and a leopard.
THE DRAGON AND THE GEORGE
Jim Eckert was a dragon. He hadn't planned it that way, but that's what happened when he set out to rescue his betrothed. Following her through an erratic astral-projection machine, Jim suddenly found himself in a cockeyed world - locked in the body of a talking dragon named Gorbash. That wouldn't have been so bad if his beloved Angie were also a dragon. But in this magical land, that was not the case. Angie had somehow remained a very female human - or a george, as the dragons called any human. And Jim, no matter what anyone called him, was a dragon. To make matters worse, Angie had been taken prisoner by an evil dragon and was held captive in the impenetrable Loathly Tower. So in this land where georges were edible and beasts were magical - where spells worked and logic didn't - Jim Eckert had a problem. And he needed help, by george!
Gordon R. Dickson (1923 - 2001)
Gordon Rupert Dickson was born in Alberta, Canada, in 1923 but resided in the United States from the age of thirteen. Along with Robert A. Heinlein, he is regarded as one of the fathers of military space opera, his Dorsai! sequence being an early exemplar of both military SF and Future History. Dickson was one of the rare breed of authors as well known for his fantasy as his SF - The Dragon and the George, the first novel in his Dragon Knight sequence, was shortlisted for the World Fantasy Award and won the British Fantasy Award. Dickson's work also won him three Hugos and Nebula. He died in 2001.