The War Against The Rull - Panther SF PB, 05860280052 - originally 1959, this edition 1973.
When A.E. van Vogt wove several of his classic stories of The Rull into a novel, he created a work of enduring popularity in the science fiction field. The saga of the war between humanity and the alien shapechangers - a paranoid murderous alien race .
The Winged Man ( with E Mayne Hull) -Sphere SF 1977, Originally published 1976. ( 0722187319)
A time travel novel where a military sub is suddenly transpoted to a far future world