Unfortunately there is no longer an English-language newspaper in Bulgaria, though there are a couple of online English-language news sites: The Sofia Globe and Sofia Morning News
An excellent annual English-language guide to Sofia. Sofia the Insider's guide is on sale from March/April onwards each year and provides information about sightseeing, restaurants and bars, as well as a wealth of expat advice to newcomers planning on living or working in the city. They also have a blog.