The easiest way off and on campus is through the new Marion Berry Overpass. Take a right on Aggie and park in front of the Administration Building. There are both free visitor and paid metered parking spots ($1.00 hour). You will need to walk a short distance to the library.
The closest spots to the library are behind the library. Take Stadium and turn onto Aggie Road towards campus. Take a left at University Loop, then a right at the second stop sign. There are two parking lots behind the building: a smaller parking lot immediately to the right with free visitor parking (you will need to walk a short distance to the library) and the larger lot with metered ($1.00 hour) and free museum parking. The larger lot will put you the closest to the library.