Bob Dylan is releasing another collection of "bootleg" recordings on Oct. 7. The Columbia release Tell Tale Signs covers the past two decades of material from America's most-famous singer/songwriter. You can preview the 2-CD package online now, before it hits stores, exclusively at NPR.org/music. Listen to complete songs and find liner notes (like they used to have when we bought everything on vinyl). It's been getting a lot of good buzz - and for those who aren't crazy about electric Dylan, he does some acoustic versions of his rockier hits.