I always say to myself that it is not worth to force books through. I do like 1/5th then I drop it if it did not catch me. Now I'm reading Pandora's star which is a great scifi book and sandwitched inbetween the great scfi chapters there is this uninteresting detective storyline with zero scifi, people talking to eachother about uninteresting stuff. I found myself forcing the book and questioned multiple times if I should continue. Then again a great chapter comes with interesting stuff I get hooked and within an eyeglance I'm back into this people talking each other for 30 pages. I will decide if I keep going or not, maybe I try to force it throgh the base storyline is keeping me hooked. Did you had any similar experience? What did you do?
I tend to set things down if it's not working for me at the moment, because sometimes later I'll come back to it and it will. But in this case, where it's part not the whole you're struggling with, maybe you just need to know what the point of the bits you find uninteresting is? The writer will have included all of it for a reason.