Penguin, Middlesex, 1977.  ISBN 0-14-004401-9.  MMPB, 205 pages.  Light edge and cover wear, lower front corner bend; light reading creases along spine edges; binding sound.  Interior clean and unmarked with tanned pages.  “From a great distance the Yela’s recorded message crackled through the micro-earpiece: ‘For the time being you have won.  But I am not defeated so easily.’  That had been three years ago, after Dick Warboys had repulsed the invading Yela by firing a lithium bomb into the sun.  But now that threat seems near fulfilment as scientists detect the rapid approach of a vast, engulfing cloud of hydrogen.  To save the Earth, Warboys and his allies from Ursa Major set out in pursuit of the Yela – on a voyage through deepest space.” (from rear wrap)