Image by Michiel Hendryckx, via Wiki­me­dia Com­mons Occa­sion­al­ly I slip into an ivory tow­er men­tal­i­ty in which the idea of a banned book seems quaint—associated with sil­ly scan­dals over the tame sex scenes in James Joyce or D.H. Lawrence. After all, I think, we live in an age when best­seller lists are topped (no pun) by tawdry fan fic­tion like Fifty Shades of Grey. Nothing’s sacred. But this notion is a mas­sive blind spot on my part; the whole aware­ness-rais­ing mis­sion of the annu­al Banned Books Week seeks to dis­pel such com­pla­cen­cy. Books are chal­lenged, sup­pressed, and banned all the time in pub­lic schools and libraries, even if we’ve moved past out­right gov­ern­ment cen­sor­ship of the pub­lish­ing indus­try. It’s also easy to for­get that Allen Ginsberg’s gen­er­a­tion-defin­ing poem “Howl” was once almost a casu­al­ty of cen­sor­ship. The most like­ly suc­ces­sor to Walt Whitman’s vision, Ginsberg’s orac­u­lar utter­ances did not sit well with U.S. Cus­toms, who in 1957 tried to seize every copy of the British sec­ond print­ing. When that failed, police arrest­ed the poem’s pub­lish­er, …