Dave Duncan 
Destiny of the Sword 

Wally Smith, having died on Earth, finds himself reincarnated as a swordsman in another world and entrusted by the presiding goddess with a mission that has no appeal for him at all. Can he bring together all the swordsmen to finally defeat the Sorcerors and their terrible technology? Wally isn’t quite convinced he should, but Goddesses can be very persuasive… This is the third and final exciting book, after THE RELUCTANT SWORDSMAN and THE COMING OF WISDOM in THE SEVENTH SWORD TRILOGY.