First is high quality slip case edition 6-7/8x10" hard cover "Official Guidebook New York World's Fair 1939" with 200 b/w slick paper pages. Slip case has lt. wear. Fine. Book is Exc. Next is 5-3/8x8.25" soft cover "Masterpieces Of Art Official Catalog" with 292 pages. Pages 217-291 are printed on slick paper reproducing famous paintings. Issued for May to Oct. 1939 exhibit. Covers have very minor edge wear, o/w book is near Exc. Next book is 7.25x9-3/8" hard cover with dust wrapper "The New Wonder Book Of Knowledge" published by Winston. 600 pages special World's Fair edition includes 16 pages on the 1939 NYWF and six pages on "Golden Gate International Exposition". Dust jacket has Fair colors with front cover art of Trylon and Perisphere while back cover has long distance photo of Golden Gate Expo. Dust jacket has color rubs and bit of wear around edges. Fine. Inside pages are lightly toned at edges. VF. Fourth book is 8x10.75" hard cover with dust jacket "Book Of Nations New York World's Fair" published by Winkler & Kelmans 1939. Contains 192 illustrated pages with some accent color. Contains extensive information on various countries who had pavilions at the fair, most of whoms pavillions are shown. Dust jacket has color rubs with some wear around edges. Near Fine. Inside covers have bit of age toning, inside front cover has small clipping taped in place at upper left. Rest of contents are VF. Nicely illustrated group.