You can use the OpenOffice.org Writer Master Document feature to generate a single bibliography from multiple documents. This allows you to create a cumulative bibliography from any number of book chapters.
To generate a single bibliography:
In each of your documents, or chapters, insert your citations to link them to references in an EndNote library.
In each document, go to the EndNote menu and select Unformat Citations to unformat all of the citations in the document.
Close all of your documents.
Create a File > New > Master document.
Insert and display each of your chapters as subdocuments. (Check the OpenOffice.org Writer help documentation if you need step-by-step instructions.)
Note: If you have collapsed subdocuments to hide their content in Outline view, make sure you expand them in order to display the contents of all subdocuments before continuing.
From the EndNote menu, select Format Bibliography.
Note: Your documents must allow read/write access; they cannot be designated Read-only (locked).
Verify the formatting options and click OK.
EndNote creates the bibliography, using citations from the master document and all displayed subdocuments, and places it at the end of the master document. You can move the bibliography anywhere within the master or subdocuments, and it will remain in that location even when you reformat.
Note: If you select Writer's Insert > File command and select the "Link" option to insert a document into the text, EndNote will not format the linked document when you format the main document. The text from the linked document will be skipped.