Books like Works (Hitch Hiker's Guide to the Galaxy / Restaurant at the End of the Universe / Life, the Universe and Everything / So Long, and Thanks for All the Fish / Mostly Harmless / Young Zaphod Plays it Safe)
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Works (Hitch Hiker's Guide to the Galaxy / Restaurant at the End of the Universe / Life, the Universe and Everything / So Long, and Thanks for All the Fish / Mostly Harmless / Young Zaphod Plays it Safe) is 815 pages, about 14 hours 57 minutes at 250 words a minute.
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The Algebraist 9.2 h 
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Sarek 7.9 h Bar height shows length. Estimated at 250 words a minute.