I have a general rule that if after reading a book for 50 pages if I am not interested at that point I drop it. Much like the stock market where you occasionally have to accept a lost and get rid of the stock, book reading is the same way.
"The World Below" by Sue Miller is one of those books I have given up on. It is about the life of a grandmother and a granddaughter. The grandmother has died and the granddaughter is going thru some personal readjustment so she moves into her grandmother's house. The book is published by Ballantine Books and is about 275 pages long so maybe the remaining 225 pages are totally exciting but I will never know.