While I don't have the skill/time to take on a project like this I really loved the book 'Code' by Charles Petzold. It walks you through the design of a CPU st

While I don't have the skill/time to take on a project like this I really loved the book 'Code' by Charles Petzold. It walks you through the design of a CPU starting from nothing. There is also 'From NAND to Tetris in 12 steps', I haven't looked closely at that but from what I've heard it gives a similar level of detail.