"I'm sure people have heard of this, but not enough. "A Gentle Murderer," by Dorothy Salisbury Davis. It is odd and unsettling and unlike anything being written today."
""Misfortune," by Wesley Stace. I actually tried to buy the rights. It is an epic Dickensian story, full of fabulous characters, wild plot twists and a healthy dose of gender fluidity."
"I'm not sure it is strictly about aging, but there is a section near the end of "A Tale of Two Cities," by Charles Dickens, where Carton looks back at his life and considers his death. I find it enormously moving and strangely modern."
