He is an encyclopedia of iranian history from every time frame you wish. from times of zartosht until today. He has a brilliant book called "foroopashiye sasanian". World class stuff that explain from the first days how the arabs planned to attack iran, very detailed until they took over the whole country. He has books about how ghaznavi turks started to take over iran, about seljuk turks, safavi turks, about kourosh, zartosht, mazdak, about yaghoobe leis and on and on. he has a book called "eslam haaye moteaarez", fantastic book too. another book called "fergheye shia", a detailed explanation about this bimaari....