UCB Libraries

Prospector/Mobius FAQ

As part of our Interlibrary Loan service, CU Libraries borrows materials that are not available in the CU Libraries from other libraries and vendors. This includes materials not owned by CU Libraries, as well as items that are checked out, lost or missing.


Prospector is a group of Colorado and Wyoming Libraries. Borrowing from Prospector Libraries is generally the quickest way to get books and media not available at CU.


If what you want is not available in Prospector, you may be able to find it in Prospector’s partner catalog: Mobius. Look for the link within Prospector to take you there.


Am I eligible?

Current CU faculty, staff and students may use this service.

What can I request?

We will try to obtain any type of library material. However textbooks, whole journal volumes, genealogical sources, unpublished manuscripts, and materials that are rare, fragile, or in high demand are often hard to get.

How do I place a request?

  1. First, check Chinook, the CU Libraries catalog
  2. If you cannot find what you need, look for the small Prospector icon in Chinook. By clicking on this icon, you can replicate your search in Prospector. When you find what you want, just choose the "Request Item" option and follow the instructions on the screen.
  3. Alternatively, you can search the Prospector catalog directly.
  4. If all copies of materials are checked-out a hold may be placed although books may not be recalled.
  5. You must select a pick-up location (Norlin or a branch library)
How long will it take?

Plan ahead when requesting materials. Prospector/Mobius requests should take 3-5 working days.

Where do I pick up my materials?

Books must be picked up at Norlin or one of the branch libraries. (Map) (Hours)

How much does it cost?

There is no charge for this service. However $100 will be charged for lost books ($75 lost book fee plus $25 processing charge)

How long can I check material out for?

Books generally check out for 21 days; video and sound recordings check out for shorter lengths of time. You are allowed to renew items once.

How many items can I check out?

You may request up to 70 items at any one time.

How do I return materials?

You can return materials to Norlin, or any of the branch libraries. (Map) (Hours)

Please do NOT return them directly to the lending institution.

How do I get help with Prospector?

Please contact:

What is Prospector?

Prospector is a service of the Colorado Alliance of Research Libraries and has been in operation since 1999. It currently supports over 40 academic and public libraries throughout Colorado and Wyoming. The system offers over 12.5 million unique titles (over 30 million copies) and is the largest patron initiated discovery and requesting service in the Rocky Mountain region. The Alliance was founded in 1981 and serves the research libraries in Colorado and Wyoming.

What is MOBIUS?

Since its founding in July 1998, MOBIUS has transformed library services for the citizens of Missouri. The consortium's purpose is to share library materials, information, and services using accessible, cost effective methods. Today, the MOBIUS Union Catalog has expanded to include more than 25 million items, serving over 1.5 million people from the higher education community and the state of Missouri.


MOBIUS has 70 members, which include 61 academic libraries, four public libraries, two special libraries, the Missouri State Library, and two Associate Members, serving a total of 143 physical branches. MOBIUS manages INN-Reach, a union catalog and resource sharing tool from Innovative, as well as their Sierra library services platform for member libraries.


See more at: Missouri's Mobius and Colorado's Prospector Announce Library Materials Sharing