The upcoming memoir of Alex Van Halen is a “love letter” to late brother Eddie, according to the first details to appear. Due on October 22, the book – simply titled Brothers – runs to 384 pages in hardcover format. Van Halen News Desk reported it had uncovered the product description, which is yet to appear on publisher HarperCollins’ website. The story will follow the Van Halens from their birthplace in the Netherlands to Pasadena, Calif., and their young lives with a strict but fair mother. After that, it will also include the kind of rock ’n’ roll stories one might expect from Van Halen’s …