Here is a book -- or actually a group of small books, boxed together -- which slipped up on an unsuspecting public and achieved almost front page space in the literary supplements. It is fourth in the series of which Edith Wharton's OLD NEW YORK was the first, and comes at an auspicious moment with the Fair opening on the first of June. The Fort tells the story of old Fort Dearborn and of the massacre which almost wiped out the first inhabitants. Then comes The Duel, which gives us Chicago of the mushroom stage, and perhaps the most gripping story of the four. Next, Debt of Honor, in which the price of conflict between two sisters and two brothers is paid by the younger generation, at the time when Chicago was groping its way from the status of a small town to that of a city. Finally, in Metropolis, we see the years during which Chicago, the modern city, grew out of the ashes of the great fire. A slender connecting thread is found in the recurrence of the names of families, but it is essentially a story of the growth of a city, and it destroys once and for all, the usual implication that Chicago is lacking in glamor or tradition. A book that many readers will enjoy at home, but that everyone who is going to Chicago for the Fair, should read as a password to the city, before he goes.