Landau's main themes of research are Ottoman and Middle Eastern ideologies and nationalist movements, political radicalism, minorities, pan-Islam, pan-Turkism, politics and language in Central Asia. His published works are 23 books (selected list below). He has also edited 12 books and has written numerous book-reviews in specialized journals and various encyclopedias. His books and articles were published in ten different languages: Hebrew, Arabic, Turkish, English, French, German, Greek, Italian, Russian and Chinese (see his Bibliography of Published Works, 2015). Jacob M. Landau, Bibliography of published works. Landau, Jerusalem: 2015 (690 items).