Jenny Arch writes: “‘Upselling’ is a sales term that refers to convincing customers to purchase additional items or a more expensive version of the same item. However, we can ‘upsell’ in libraries too—and it doesn’t cost people anything! It’s just a way of promoting library materials or services that patrons may not be aware of yet.” Readers’ advisory, programming, databases, and library consortia services are all opportunities where upselling might help patrons make fuller use of their libraries.