This typo "is a powerful force; you're obliged to conform when there's no other course." There are 51 examples of Irresistab* in OhioLINK, making it "high probability" on the Ballard list. No wonder, since the suffix -ible is a variation of -able. Make over your library catalog from just plain "able" to "access-ible" by addressing this typo. Information seekers will surely find it "simply irresistible."
(Robert Palmer from allmusic.com.)