HOW TO SAVE YOUR OWN LIFE
by ERICA JONG
310 pages. Holt, Rinehart and Winston. $8.95.
Erica Jong writes not so much novels as almost breathlessly up-to-date confessional bulletins. When last seen in Fear of Flying, Jong (who calls herself Isadora Wing on paper) was soaping up in her psychiatrist-husband's bathtub, waiting rather ambiguously for him to return and forgive her for the 340-page sexual excursion that made up the novel.
It didn't work out. At the start of How to Save Your Own Life, Erica/Isadora is slipping out of the Wing/Jong Upper West Side co-op apartment for the last time, leaving the...