One embodiment of the present invention provides a method for allowing a first user to view a collaboratively annotated electronic document. During operation, the system identifies a set of users based on the similarities of online behavior between the identified users and the first user. The system further ranks the identified users based on degrees of similarities between these users and the first user. The system then retrieves an electronic document selected for viewing by the first user and determines whether at least one of the identified users has annotated the electronic document. Based on the determination, the system augments the electronic document with annotations from the identified user and displays the annotated electronic document to the first user.