Mystery of the Royals set of 3 books with mysteries in Palaces 
 
The Taj Conspiracy by Manreet Sodhi Someshwar
Mughal scholar Mehrunisa Khosa stumbles on a conspiracy to destroy the Taj Mahal when she discovers the murder of the Taj supervisor, and the Quranic calligraphy on the tomb of Queen Mumtaz altered to suggest a Hindu origin of the Taj Mahal.... That urban legend had always existed. Now, though, someone was conspiring to make it come true.
All about royals and palaces Set of 3 books Murder mystery, 
 
A Very Pukka Murder: A Maharaja Mystery Arjun Raj Gaind
Maharaja Sikander Singh - Light of Heaven, Sword of Justice, Shield of the Faithful, sole ruler of Rajpore - is slow to rise the morning after the 1909 New Year's Ball. But news of a murder galvanizes him. Major William Russell, the English Resident of Rajpore, is dead in his bed. A lover of luxury cars and beautiful women, Sikander's deepest passion is for mysteries. As the clock starts ticking, Sikander must overcome obstacles, false trails, and the growing hostility
 
In Arabian Nights: A Caravan of Moroccan Dreams 
Named one of Time magazine’s Ten Best Books of the Year, Tahir Shah’s The Caliph’s House was hailed by critics and compared to such travel classics as A Year in Provence and Under the Tuscan Sun. Now Shah takes us deeper into the real Casablanca to uncover mysteries hidden for centuries from Western eyes.