I know, or strongly think, that grondy at least has read The Guide because of his definition of "to froodie"

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. Apart from the HHGTTG series, he also wrote a few books (two, I think) on Dirk Gently, a rather conspicious private detective. The books are called Dirk Gently's Holistic Detective Agency, and The Long Dark Tea-Time of the Soul. (off the top of my head, do please correct if wrong)