Columbia subject headings:
Harvard subject headings:
IS (Organization)
Islam and politics.
Islam and state.
Islamic fundamentalism
Middle East--Politics and government.
Terrorism--Middle East--History--21st century.
Terrorism--Religious aspects--Islam
Princeton subject headings:
IS (Organization)
Islam and politics.
Islam and state.
Islamic fundamentalism.
Middle East--Politics and government--21st century.
Sunnites.
Terrorism--Middle East--History--21st century.
Terrorism--Religious aspects--Islam.