The library is a popular community meeting place. The Warren Library has a wide selection of books, videocassettes, and audiocassettes for both children and adults. There is a growing collection of magazines, books on tape, and CD-ROMs for patrons to borrow. Dedicated staff help patrons reserve items from other Somerset County Library System branches or inter-library loan items from outside the library system. This greatly enhances the number of materials the library can provide to its patrons.
Programming is a very important aspect of library service.
An extensive schedule of children's programs including storytimes, crafts, puppet shows and musical events is offered throughout the year. The Summer Reading Club is a very successful way for children of all ages to have fun while reading and attending the popular related programs. For adults, the library offers a monthly Current Books discussion group, craft programs, speakers on topics such as investing and health, and local author book readings. The Friends of the Warren Library is a group whose purpose is to support the library. The Friends were instrumental in organizing a fund raising campaign to furnish and equip the new library.