I actually can't think of any other book I just stopped reading.
The Wheel of Time, also for the same reasons.
Although to be fair, I should have stopped buying them after the second book, whose first chapter takes at least 20 pages and can be summed up as "[hero] was doing some sword training on top of a tower. He stopped. There was a light breeze. He got down the tower." At least if the rest had been some summary of the previous book, that would have made sense, but no.