FALSE ENTRY, by Hortense Calisher (484 pp.; Little, Brown; $5.75).
Author Calisher, whose elliptical New Yorker stories have brought her a small but fanatical following, has labored for six years on this first novel. Unhappily, she has brought forth a mousse: a gelatinous concoction inflated with whipped-in wind. The theme is "false entry into another person's life, into his present by means of his past." Simply, this means one man's pretense that certain things happened to him that actually happened to someone else. The pertinence of the theme, symbolically or literally, is...