Topical Currents begins with author and History Channel host Brad Meltzer, whose latest book is an unconventional presentation of HISTORY DECODED: The Ten Greatest Conspiracies. Each chapter has a removable envelope, which contain facsimile documents. You can hold John Wilkes Booth’s “Wanted” poster. What about D.B Cooper? He pulled off the only unsolved skyjacking. In the second half of the program, Linda Gassenheimer’s Food & Dining with wine columnist Fred Tasker. Topical Currents Thursday at 1pm on WLRN.