How to Build a Rolling Library Ladder - This Old House
92 in. Clear Pre-Finished Maple Library Ladder (104 in. Reach) Polished Brass Sliding Hook Ladder Kit with 12 ft. Rail EG.300-92MA-12.06-PF - The Home Depot
Amazon.com: DIYHD 4FT Home Office Rolling Library Ladder Hardware,Black Sliding Rail Kit for Bookshelf : Tools & Home Improvement