Up for sale is a CD by Mass Mental? titled "How To Write Love Songs", with the catalog number ZACB-1006. This album features Robert Trujillo, who is best known for his work as the bassist of Metallica. The music on this CD is a mix of different genres, including hard rock, punk, and funk. The album was released by Zain Records and includes songs that will surely please any rock music fan. With the aspect of the artist being Metallica, you can expect to hear some heavy guitar riffs and powerful vocals. This CD is a must-have for collectors and fans of this type of music.