Beyond The Jupiter Effect - John GribbinMacDonald and C, 1983, Hardback in Dustwrapper..
Condition: Very Good - in Very Good DJ. Very slightly ruffled edges of DJ. Leans slightly.
In the past it was usually assumed that gravitational interplay between the various bodies in the solar system could for all practical purposes be taken as a constant in its effects. The pattern of tided denied this, and later sunspots began to be seen as another disturbing factor, but it was only with the publication of this book that slight differences in planetary "pull" were suggested to be potentially lethal to large and highly-populating theories then testing them to destruction and redefining them. Beyond The Jupiter Effect's explains how.