I use a 50 page rule (25 if less than 400 pages). If you can't interest me within that time, I'm done. The only two books I violated that rule on (and was happy I did so) was the first Wheel of Time book (Eye of the World?) and Game of Thrones. I just had a hard time grasping them on first reading, took a break, then went back to them and was able to enjoy them.Agreed 100%. I wish I could remember which ones I read that were bad but its been so long. I just bought Death Masks by Ed Greenwood a few weeks back and I just couldn't get passed the first 10 pages so I returned it to Amazon. The writing style seemed convoluted and drawn out to where it made it hard to follow. I dont remember his earlier stuff I read being like that. In his defense I havent read a fantasy novel in quite some time so it may have just been me.