Title: Workshop Manual (small)
Publisher: Mazda

Factory workshop manuals are mandatory for working on your RX-7. Other manuals, like Haynes, are fine supplements, but only the factory manuals have the level of detail necessary to do the job right. Accept no substitute!

The small version is slightly harder to use (smaller illustrations, doesn't lay flat), but it's easier to carry around and typically includes the wiring diagram. Expect to pay between $50 and $100, new. Do not touch your car without one!