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The theme of the series is when five friends are together one night and one of them disappears, and is never found. Years later the four girls Aria, Spencer, Hanna, and Emily, start getting text messages, notes, emails, and many other forms of contacts, with messages containing their most precious secrets, things only Alison knew, (Alison is the friend that disappeared long ago). The four old best friends find out all of them are getting similar messages, and band together to try and stop the mysterious messenger who always signs the messages -A. But soon the messages get more incriminating, and they get threats from "A" and they all get caught in their web of lies. The series is so far 6 books long, and there are still more to come.

(just so you know, that's plot, not theme.)

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13y ago

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