第51张个人专辑 Pike 21 is the fifty-first studio album by guitarist Buckethead, and the twenty-first installment of the Buckethead Pikes Series. The album was part of a series of fifteen pike albums that were released in close succession from one another during the first half of 2013. The album was announced on July 29th simultaneously along with Pike 22 as a limited edition, untitled album with hand drawn covers and signed by Buckethead himself. Both albums were intended to be released on August 23, but got pushed back to September 3rd. A standard edition was announced but has not yet been released.