Materials on contract law are generally located on the 4th floor (map) in the call number range KF801 - KF1244.
Materials on Texas contract law are located on the 2nd floor in the Reading Room (map) in the call number range KFT1350 - KFT1394.
Find additional contract law resources in TALLONS.
Farnsworth on Contracts (4th ed.) by 
Williston's A Treatise on the Law of Contracts (4th ed.) by 