OASIS AUDIO CLASSIC RADIO SHOWCASE SERIES   Oasis Audio has gone into the vaults and dusted off the very earliest form of audio book, old time radio shows, for our listeners. Introduced episode by episode by Jim Engel, old time radio authority and board member of the Museum of Broadcast Communications in Chicago, this series of classic radio shows is sure to have something for everyone. Celebrity casts and top-notch writers made the 1920s through the early 1950s, the golden era of radio. The series features seven exciting themes with 100 episodes in each. That is 700 classic radio programs in all.   Greatest Detective Shows   Thrill to the hardboiled adventures of Ellery Queen, Philip Marlow, Dragnet, The Man called X, Philo Vance, Rocky Fortune and so many more as heroes fight the bad guys. 100 great Detective classics in ten volumes. Volume 7 The Man from Homicide 1951_07_23 Eddie Kent Case - The Man from Homicide 1951_08_06 Drowned Girl Case - The Mercury Theatre on the Air 1938_09_25 The Immortal Sherlock Holmes - Mr. and Mrs. North 1950s Bet on Murder - Mr. and Mrs. North 1950s Brother Danny - The New Adventures of Nero Wolfe 1950_10_27 The Care Worn Cuff - The New Adventures of Nero Wolfe 1950_11_03 Dear Dead Lady - The New Adventures of Nero Wolfe 1950_11_17 The Careless Cleaner - The New Adventures of Nero Wolfe 1950_11_24 The Case of the Beautiful Archer - Pat Novak For Hire 1949_04_09 The Sam Tolliver Case Various Authors.