Were can I find a simple CPU Design tutorial / book?
There are no CPU design tutorials because those who design CPUs are generally far beyond being tutored. Tutorial text are at the far lower levels:


gate design (from transistors)
MSI* components design (= register, mux, demux, adder) from gates
ROM and RAM design (from gates or MSI components)


When you have mastered theses levels to sufficient degree you can probably imagine how a CPU could work. 

Those 1000 page books (The Patterson &amp; Hennessy books are my favourite) explain how a modern CPU is built. You don't need that to make a basic CPU, there are plenty designs on the web that show an 8 or 16 bit CPU built from 74xxx level chips.

*MSI - medium-scale integration (vs small-scale integration being logic gates etc.)