Ramage is in many ways a contrary to Hornblower. He is rich, a nobleman, intuitive rather than intellectual, hopeless at mathematics, but they share the sense of duty to the navy and to the seamen serving under them.
In the first of the novels we are presented with Ramage and the most important of the characters who will follow him in the rest of the novels. It starts dramatically with Ramage waking up after a severe blow to find himself instantly promoted from 5th in command to 1st in command, since all his superiors are dead. The ship is sinking and the enemy is ready to fire the conclusive barrage.
Very good book, but if you haven't read Hornblower yet, do that first.