When I was a wee lad my uncle gave my his copy of the Technical Manual. I read it to pieces and traced just about every schematic inside it. It has been one of the biggest influences on me in how I view art, design, and many things in the world. Not until many years later when I started researching Trek things online did I realize it wasn't entirely accurate or canonical. But considering he created it almost entirely from TV recordings and still frames, with little to no access to original props and sets, I find it even more impressive. In fact I prefer a lot of the things in the book that contradict what is seen or mentioned on-screen.