Second book from the Sword of Truth series. If you are interested in the review of the first book then you can find it here: Wizard's First Rule.
I had to stay up for 24 hours, but I found it pretty exhausting. The trick I used is instead of reading technical or business books I have picked second book of the series I know would be gripping and interesting. I have even found a second book better than the first one (but I admit that I may have get used to the style of the author). For sure it worked to keep me up, it was even working when I should go to sleep. It really was interesting.
Author style of writing and the fact that he tries to be friendly to new readers is sometimes annoying, especially when you think how much it adds to the book length, but there have to be some downsides.