Welcome to the Discworld & Pratchett Wiki. Have fun, contribute and be warned articles may contain nuts and spoilers to the plots of the books.

From Discworld & Pratchett Wiki

First, he really preferred to be known as Achmed the I Just Get These Headaches. He could become very disturbed, otherwise. Achmed was the great necromancer of Klatch, and when he could pull himself together, one of the major wizards of history. Stark, staring knurd from pots of Klatchian Coffee, Achmed aggravated his...symptoms while compiling the Necrotelicomnicon, one of the most dangerous books known to wizardry. His previous work : Achmed the I Just Get These Headaches's Book of Humorous Cat Stories, however, suggests a pre-existing mental brittleness.

The cynical and the ailurophobic, however, might be inclined to suggest that out of his two books, writing the Necrotelicomnicon actually came as a blessed relief after dealing with cats for his first book.