This week on Library Rap, Tim talks to Substantial. Substantial breaks down his new album, Adultish, his musical journey, defining success, why Chuck D calls him a Hip Hop Scientist and much more.

Library Rap: Teflon

"Library Rap: The Hip Hop Interviews with Tim Einenkel" is like "Inside the Actor's Studio" for hip hop. Every week, Tim gets inside the art of hip hop in interviews with the most influential emcees, artists, producers, DJs, and sound engineers. Notable guests have included, Ice T, Royce Da 5'9", Joell Ortiz, Talib Kweli, Chuck D, Big Daddy Kane, MC Lyte, David Banner, Scarface, Rah Digga, Rapsody, Smif-N-Wessun, Buckshot, along with many more.