Authorities had previously issued a pair of warrants for Joy Cassidy's arrest earlier this month after she failed to appear in court.
But she turned herself in at the Ada County jail on Monday. Cassidy was originally arrested on June 13.
That's after police say she poured mayonnaise in the library's book drop box that day - and was a person of interest in at least 10 other condiment-related incidents at the Ada Community Library in Boise since May 2009.
In addition to malicious injury to property, Cassidy has also been charged with carrying a concealed weapon without a license.
