Twins Mission (2007)

[cranefly]

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Hold the phone - doppelgangerphiliacs?

Is that really a thing? 

I just did some searches.  Can't find anything.  But I did sort of get a hit in the text of Beyond Three Words on google books:

"Philia was staring at the doppelgangers, breathing heavily. There was a sudden rush in her body. She looked at Matt and noticed that his reaction was no different from hers.  A flame ignited in his eyes.  They came forward and faced the twins. All four knew it was going to happen any second now."