Question: Not All Who Wander Are Lost is the third solo album by which American virtuoso mandolinist, singer, songwriter, and radio personality, best known for his work in the progressive acoustic trio Nickel Creek and the acoustic folk/progressive bluegrass quintet Punch Brothers?
Context: Christopher Scott "Chris" Thile ( ; born February 20, 1981) is an American virtuoso mandolinist, singer, songwriter, and radio personality, best known for his work in the progressive acoustic trio Nickel Creek and the acoustic folk/progressive bluegrass quintet Punch Brothers.  He is a 2012 MacArthur Fellow.  On October 15, 2016, he became the host of the radio variety show "A Prairie Home Companion". Why Should The Fire Die?  is the third major album release and fifth album overall by progressive acoustic trio Nickel Creek.  The album was released on Sugar Hill on August 9, 2005 in the United States, and on August 8 in the United Kingdom.  "Why Should the Fire Die?"  is the first Nickel Creek album to feature string bassist Mark Schatz. The live weekly radio variety show, A Prairie Home Companion with Chris Thile, whose title indicates the new program host, musician Chris Thile, derives from the historic "A Prairie Home Companion with Garrison Keillor" ("APHC") radio show, where the changeover in the onstage hosting and program began on October 15, 2016.  Thile, an American virtuoso mandolinist and singer-songwriter, had a two decade history with "APHC" and is known for his work in the folk and progressive bluegrass groups Nickel Creek and Punch Brothers.  After two unprecedented guest host spots in 2015, Keillor decided on his successor, featured Thile as host again in January–February 2016, and fully ceded his hosting role to Thile in the October 2016 performance at the Fitzgerald Theater in St. Paul, Minnesota, continuing as the show's Executive Producer.  As of 1 November 2016, the new program presents expanded musical and comedic elements, retaining the template of the earlier program (e.g., its most recent acting and sound effect cast, and "sponsorships" from faux companies), but without such features as its earlier signature "Lives of the Cowboys" series and "News from Lake Wobegon" monologue.  Early reviews of the new program have been uniformly positive, focusing on the remaining familiar elements and on the new music and expanded musical focus brought by the new host. A Dotted Line is the fourth major album release and sixth studio album overall by progressive acoustic trio Nickel Creek.  Produced by Eric Valentine, the album was released on Nonesuch Records on April 1, 2014 in the United States. Nickel Creek is an album by the acoustic/"newgrass" trio Nickel Creek.  The group had released two albums prior to this; however, their earlier albums are no longer in print, and the band redefined their style before the release of "Nickel Creek".  As a result, "Nickel Creek" is widely regarded as their debut album.  It was released by Sugar Hill Records, and produced by country star Alison Krauss. Mutual Admiration Society is a musical collaboration between singer/songwriter Glen Phillips and progressive bluegrass trio Nickel Creek. Not All Who Wander Are Lost is the third solo album by American virtuoso mandolinist Chris Thile.  It was released on Sugar Hill in 2001. Aoife O’Donovan ( ; ] ;) born November 18, 1982 in Newton, Massachusetts, is an Irish-American singer and songwriter.  She is best known as the lead singer for the progressive bluegrass/string band Crooked Still and as a member of the female folk-noir trio Sometymes Why.  Her first professional engagement was singing lead for the folk group The Wayfaring Strangers.  She has performed and recorded with Ollabelle, Karan Casey and Seamus Egan, Jerry Douglas, Jim Lauderdale, Darol Anger, Sarah Jarosz, Sara Watkins, Christina Courtin, Chris Thile (Nickel Creek, Punch Brothers), Noam Pikelny (Punch Brothers), Edgar Meyer, Stuart Duncan and Yo-Yo Ma.  O’Donovan has also performed with the Boston Pops Orchestra and the Utah Symphony Orchestra.  In 2012, she sang on most of the tracks on the album "Be Still" by the jazz group the Dave Douglas Quintet, featuring trumpeter Dave Douglas.  During the summer of 2013, she toured with Garrison Keillor and his "A Prairie Home Companion Radio Romance Tour." How To Grow A Band is a 2011 music documentary film about the early days of American progressive bluegrass band Punch Brothers.  The film stars Chris Thile, Gabe Witcher, Noam Pikelny, Chris Eldridge, Paul Kowert and Greg Garrison and features interviews with a number of notable musicians including Yo-Yo Ma, John Paul Jones of Led Zeppelin, Jerry Douglas, bassist Edgar Meyer and Sara Watkins.  The film's structure tracks mandolinist Chris Thile's ambitious four movement suite, "The Blind Leaving the Blind" as it follows the band on their first tour as Punch Brothers in the United Kingdom and United States in early 2008 leading up to a triumphant performance at Jazz at Lincoln Center's Allen Room in New York. Mark Schatz (born April 23, 1955) is an American bassist, banjoist, mandolinist, and clogger who has recorded and toured with artists such as albums for artists such as Bela Fleck, Nickel Creek, Jerry Douglas, Maura O'Connell, Tony Rice, John Hartford, Emmylou Harris, Linda Ronstadt, and Tim O'Brien.  He is a two time International Bluegrass Music Association Bass Player of the Year award winner.  Schatz toured and recorded with acclaimed progressive acoustic trio Nickel Creek from 2003 until the start of the band's indefinite hiatus in late 2007.
Answer: Chris Thile