Two Truths and One Lie: the Answer

 

No. 3 is the lie. 

1. When I was a journalist, I attended a White House Correspondents’ Dinner that was also attended by U.S. President George W. Bush.
2. The idea for my Geomancer’s Apprentice series was sparked by the Friendship Archway in Chinatown, Washington, D.C.
3. It was my mother who lived across the street from the spirit medium. This was in Singapore. She was happy when he moved away because his rituals brought a lot of traffic to the neighborhood, and she was afraid he would lower property values.

I hope you had fun guessing the answer!