Dimitrov is the author of 30 treatises and over 250 articles and papers in the sphere of his research, as well as several books (including The Ten Lies of Macedonism and Twelve Myths in Bulgarian History). He has specialized in palaeography in Paris and also hosts the patriotic history-related Pamet Balgarska (Bulgarian Memory) show on Kanal 1.
Dimitrov believes that the Bulgars played a more important role in the formation of the contemporary Bulgarians as a people than previously believed.
Although serious researchers maintain that Dimitrov’s views on Bulgarian history are biased and can be partially challenged, they are popular in Bulgaria and he enjoys credibility among nationalist intellectuals. Dimitrov is a former collaborator of Bulgaria's communist-era security service.
Bozhidar Dimitrov's book, The Ten Lies of Macedonism (2000, 2003 and 2007), is a polemical pamphlet, based on historical documents, and is openly against the ideology of "Macedonism", i.e. the form of ethnic Macedonian nationalism that asserts an "allegedly deep-rooted ethnic and cultural distinction" between ethnic Macedonians and Bulgarians. The book has caused considerable controversy and criticism from ethnic Macedonian sources. Dimitrov claims that it has reached best-seller status in the Republic of Macedonia. The "10 lies" described by Dimitrov are:
^Modernity and tradition: European and national in Bulgaria, Marko Hajdinjak, Maya Kosseva, Antonina Zhelyazkova, International Center for Minority Studies and Intercultural Relations, Sofia, ISBN978-954-8872-70-6, 2012.
^Europe and the Historical Legacies in the Balkans, Raymond Detrez, Barbara Segaert, Peter Lang, 2008, ISBN9052013748, p. 10.
^Bulgaria and Europe: Shifting Identities, Stefanos Katsikas, Anthem Press, 2011, ISBN0857284193, p. 170.
^De Palerme À Penang, François Ruegg, Andrea Boscoboinik, Christian Giordano, LIT Verlag Münster, 2010, ISBN3643800622, p. 184.