Rock star's memoir announced

Journey keyboard player Jonathan Cain's tell-all is titled Don't Stop Believin', same as the most famous song he co-wrote for the band.

Cain joined Journey as a replacement for original member Gregg Rolie and also co-wrote mega-hits "Who's Crying Now" and "Open Arms."

In the book, due out May 1st, Cain describes tensions in the band surrounding the departure of star vocalist Steve Perry.