[kaijin]

There isn't a universal keyboard shortcut for selecting the Library folder. There is a possible workaround if you'd like to select the Libary folder in a specific perspective. Set your choice of View Bar settings and select the Libary folder in the sidebar. Save this as a custom perspective using Perspectives > Save window as > New perspective. Go to Perspectives > Show Perspectives, click on your custom perspective, and check “Restore: Selection” in the perspective's settings, and assign a keyboard shortcut to that perspective. (Note: After checking the “Restore: Selection” checkbox, you may need to save the perspective again. Just go to Perspectives > Save window as > New perspective and select your custom perspective name in the list).

If this doesn't meet your needs and you'd like to have a universal keystroke to select the Library folder in any perspective/view, submit your request to the support ninjas using Help > Send Feedback…