E.E. ‘Doc’ Smith 
Vortex Blaster 

A churning nuclear vortex, appearing out of nowhere, wreaking utter destruction — and countless numbers of them were menacing planets throughout the galaxy! ‘Storm’ cloud, nucleonic genius, set out in his spaceship Vortex Blaster to track and destroy the mysterious vortices — and embarked on a saga of discovery and conflict among the far stars and the worlds of the Lensmen . . .The Vortex Blaster is the seventh and last self-contained novel in E. E. ‘Doc’ Smith’s epic Lensman series, one of the all-time classics of adventurous, galaxy-spanning science fiction.