Wat type of books r 4m Mills n Boons? plz lemme know

I hv heard abt MnB some of d times in some forums. I know dis question is not related to d show but in some forums including dis one some of d times d leads r compared to MnB leads in some ways. Even stories r wrote of ur fav couples based on those books. So plz lemme know wat is d main theme of novels n how d leads and d stories r shown. I hv search a little on net n read in some forums too dat d heroes r arrogant while d heroines r of bimbo types. Is it true? In QH, Nuzhat wished to d shooting stars dat she wants a guy like MnB novels.