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In his recently published book "Twilight in the Desert: The Coming Saudi Oil Shock and the World Economy," author Matthew Simmons argues that Saudi Arabia will in coming decades be unable to maintain its current level of oil production, with large-economic repercussions. Simmons also examines the political and social climate of the nation and its desire to conceal the potential shortfalls from global consumers.

Matthew Simmons, an oil industry analyst and CEO of Simmons & Company International, will be online Thursday, August 4, at 3 p.m. ET to discuss Saudi oil supplies.

Submit your questions and comments before or during today's discussion.

Washington Post