Unfortunately, due to the way electronic subscriptions are set up, you cannot automatically access an Ebook that is available at another CUNY Library. 

The best way to obtain access would be to request a chapter of the Ebook electronically via InterLibrary Loan.

Library credentials are unique to that school's content only: a patron from John Jay College cannot access electronic materials from Brooklyn College remotely. The only way to access e-resources of another campus is to visit that campus Library in person.