Part number LIT-11616-31-43 is the one to write down if you are servicing a 2018 Wolverine R-Spec EPS. The machine is coded YXE70WPAJL.
Yamaha did not write a separate book for each Wolverine version that year. This 2018 volume also documents the base Wolverine and the R-Spec EPS Hunter, and the procedures run common across all three except where the text flags a difference in equipment.
The manual is organised the way factory manuals are: a system at a time, each job broken into removal, inspection against a specification, and installation with tightening figures. Wiring diagrams cover the machine as built, and the diagnostic sections take a symptom and walk it down to a cause. Match the model code above to the plate on your machine before you rely on any of it.
