Well, thats normal on fantasy themed novels (that's my main genere). Most novels, though, are about 80k.
Romance, thriller... those don't need as much worldbuilding as fantasy novels, so with less pages you can explain more proper story. Or that is what i think.
Even though, in my case, i almos don't do worldbuilding so i'm rewriting all to put some more details xD (had betatester complains about that ^^')
I also must say, thats the 1st book of a serie of 3 