Worldwar: In the Balance

This intelligent speculative novel depicts an alternate history in which, at the height of World War II, Earth is attacked by alien beings with weapons far more destructive than any possessed by the Allied or Axis forces. Turtledove ( The Guns of the South ) gives a surprisingly convincing flavor to the time-worn story of warring nations uniting to repel extraterrestrials; his human characters, both actual and invented, ring true as they struggle to trust each other after years of enmity, and although the alien threat has a B-movie feel, he makes an effort to portray the invaders sympathetically as well. The first in a projected series, the book ends where it began: in and around a battle. The smooth writing is marred only by slightly overdone dialogue for real-life figures like General Patton. The historical details, especially those concerning the weapons and methods available in the 1940s to defend Earth, are accurate and well rendered. (Jan.)