Bulgaria–United States relations to work. Bulgaria became a member of the Warsaw Pact on May 14, 1955. Though no Soviet troops were stationed on Bulgarian soil, in 1968, Zhivkov sent a Bulgarian division to join Polish, Hungarian and Soviet troops to crush a popular uprising in Prague. In 1978, the Bulgarian secret police were implicated in the assassination in London of Georgi Markov, a Bulgarian dissident who was a correspondent for the BBC World Service, Deutsche Welle radio and the U.S. sponsored Radio Free Europe. Markov was assassinated with a poisoned umbrella on September 7, Zhivkov's birthday. The rise of democratic movements across
Poisoned Pen Press A Mystery Bookstore' a decade ago, sees consolidations in the publishing industry as a threat to cultural diversity and to the survival of the independent bookstore. Poisoned Pen Press began by selling out-of-print books, but soon expanded to publish original titles. They earned two Edgar Award nominations (1998 and 2000) and many of their books receive positive reviews in trade publications and general press. In 2012, The Poisoned Pencil, an imprint of Poisoned Pen Press was founded to publish mysteries for young adults. Ellen Larson was named editor of The Poisoned Pencil. The first release from The Poisoned Pencil was