The official manuals are available either through Genos or via Tech Authority. The number of volumes varies a little by model year. I have a complete set for 2003, which includes the service manual, wiring schematic, powertrain diagnostics manual, body manual, transmission manual, and chassis manual. That's 6 volumes.
The number of volumes may have increased or decreased since 2003, which is why you should go by what Tech Authority says are the available volumes.
Ryan