When Worlds Collide
When Worlds Collide is a 1933 science fiction novel co-written by Philip Wylie and Edwin Balmer; they also co-authored the sequel "After Worlds Collide" ( 1934 ) . 
<triplet> When Worlds Collide <subj> Philip Wylie <obj> author <subj> Edwin Balmer <obj> author <subj> After Worlds Collide <obj> followed by <triplet> After Worlds Collide <subj> When Worlds Collide <obj> follows