Eric Davidson spent the ’90s fronting the Ohio punk band New Bomb Turks; now he’s written a book about it. We Never Learn: The Gunk Punk Undergut, 1988-2001 is the tale of the later generation of punk rock, or what Davidson calls the “first and only book on the last great wave of punk rock.”Davidson will be at Easy Street Records in Queen Anne today at 3 p.m. signing copies of his book.