When I was really young, Dad wasn't that well known. I don't remember when I realised he was a writer, but I do remember him leaving his full-time job at the Central Electrical Generating Board to concentrate on books.
I liked climbing trees and could often be found up one reading a book. I played games with Dad and drew maps for him on isometric paper. It was very bonding.
Dad loved computer games, and I would sit beside him for hours with graph paper, drawing out plans to try and forecast the moves he should make while he worked the computer controller.
Dad was very into electronics, robotics and computers, so I was interested in what he was doing.
The type of Alzheimer's Dad has is rare - posterior cortical atrophy or PCA - and it affects his spatial awareness and the way he judges distance. His first symptoms were erratic typing and spelling, but to talk to him, you'd never know there was a problem.