A Betsy-Tacy-Tib High School story- and sure of the following of that popular series. The time is 1908 -- the setting again Milwaukee. And the familiar tric take a leaf from big sister Julia's college activities to start a High School sorority, with disastrous results. The book ultimately joins the ranks of battle against greek letter societies (a popular phase of this season's junior fiction). These stories- while not exceptional in literary merit, are good, dependable teen age material, school doings, social doings and teen age love interest, well blended.