Legal Question in Intellectual Property in California

Names and titles, in general, are not protectible under copyright law, but if the band is engaged in commerce under its name (that is, does concerts in multiple states or sells recordings), it may be a trademark. More important to you, though, is whether you think the band would sue you over the mention in the book. (Being in the right doesn't stop someone from suing you and costing you money, even if they lose later.) So, why risk it, especially if the band is nothing like the real one? Choose another name.