Dar Williams ’89 has released a new double retrospective CD, Many Great Companions (Razor and Tie). The first CD contains live acoustic performances that reimagine fan favorites, while the second showcases original recordings from past albums of her 20-year career. The collection features guests such as Mary Chapin Carpenter, Sara and Sean Watkins of Nickel Creek, Patty Larkin and the trio Motherlode. Songs Williams revisits include “As Cool as I Am,” “Spring Street,” “When I Was a Boy” and “The Babysitter’s Here.” In his recent review of the album in American Songwriter, Matt Popkin writes: “Throughout the new recordings, Williams’…