The Red Knight!

Aka a fantasy story where a mercenary knight slays Boglins,Irks and Wyverns.

I just read fourth tome. I have strange relationship with these books. From one side - worldbuilding is not very good - totally different world with magic, monsters and de facto gods, where not only somehow nations are exact equivalents of Earth ones but with another names, history is nearly the same and religions are exactly the Christianity and Islam (not some Crystal Dragon Jesus version, but the same). And style is sometimes weak too (although maybe it is fault of the translator). But somehow they engage me enough to read whole cycle.