Each campus library has a different policy for how long they hold on to lost items. Your best bet is to call the campus library where you left your item and check to see if someone turned it in. The phone numbers for each campus library are below:
J. Ardis Bell Library
Northeast Campus
(817) 515-6627
Walsh Library
Northwest Campus
(817) 515-7725
Jenkins Garrett Library
South Campus
(817) 515-4524
Judith J. Carrier Library
Southeast Campus
817) 515-3081
Tahita Fulkerson Library
Trinity River Campus
817) 515-1220
If the campus library does not still have your item, chances are that it was turned in to Business Services on that campus. There is a link below to the page on the TCC website that has contact information for each campus' Business Services office.