Yes! You can pick up and return books at Hopkins libraries at the following locations.

Baltimore:
Friedheim Library of the Peabody Institute
21 E. Mount Vernon Place 
Baltimore, MD 21202
Phone: 667-208-6655

Harbor East Library of the Carey Business School
100 International Drive
Baltimore, MD 21202
Phone: 410-234-9286

Welch Library
1900 E. Monument Street 
Baltimore, MD 21205
Phone: 410-955-3410

DC Regional Libraries:
Mason Library at the School of Advanced International Studies (SAIS)
1740 Massachusetts Ave. N.W., 6th Floor
Washington, DC 20036
Phone: 202-663-5900

Washington Resource Center  - DC Campus
1717 Massachusetts Ave. NW, Suite 100
Washington, DC 20036
Phone: 202-452-0714

Montgomery Resource Center
9601 Medical Center Drive, Gilchrist Hall
Rockville, MD 20850
Phone: 301-294-7030

Columbia 
6740 Alexander Bell Drive
Columbia, MD 21046
Phone: 410-516-9700

For more details, email circmail@jhu.edu.