I'm not sure you provided us with enough information.  Are all of the authors named in the 4th edition new or are some of them a carryover from the 3rd edition?  If all new, then I think for sure you have a new work.  To link them I would use a sequential linking field with the relationship designator "supersedes", since this work supersedes the previous one.  According to LC training materials, no 700 added entry would be made for the earlier work, although you could use the designator "Supersedes:" with a work access point in a 700 I suppose.

Adam

On Tue, 13 Aug 2013, Yan Liao wrote:

> Date: Tue, 13 Aug 2013 21:00:32 +0000
> From: Yan Liao <[log in to unmask]>
> Reply-To: Program for Cooperative Cataloging <[log in to unmask]>
> To: [log in to unmask]
> Subject: Is this a new expression or new work
> 
> Dear Colleagues,
>
> We are cataloging one book: Of counsel (4th edition). On the title page, Jean L. Batman is listed as the first named author with bigger font than the other 2 authors, Harold G. Wren and Beverly J. Glascock. The previous 3 editions are under the title "The of counsel agreement" and the first named author is  Harold G. Wren.
>
> In the preface to the fourth edition, the author Jean L. Batman said "Although I agree with the authors of previous editions that a well-drafted 'Of Counsel' agreement is indispensable for lawyer or law firms... only about half the 'Of Counsel' attorneys I interviewed for this fourth edition had written 'Of Counsel' agreements. For this reason, and because this book goes well beyond contract considerations, the title for this edition has been abbreviated to simply 'Of Counsel'."
>
> Here are my questions
>
> 1.       should this edition be cataloged as a new expression or new work? (I personally lean toward new work based on the author name change and title change)
>
> 2.       If it's cataloged as new work, how should this be connected with the previous edition as related work? Should 775 be used or use 700 Name/Title (Wren, Harold G|t Of counsel agreement)?
>
> 3.       If it should be cataloged as new expression, I think it should be 100 Wren, Harold G. 240 Of counsel agreement with optional 775 to the previous edition?
>
> Thanks for any help.
>
> Clara
>
>
> ______________________________________
> Yan Liao (Clara)
> Head of Cataloging
> Georgetown University Law Library
> 111 G Street, N.W.
> Washington DC 20001
> Phone: (202)662-9190
> [log in to unmask]<mailto:[log in to unmask]>
>
>

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Adam L. Schiff
Principal Cataloger
University of Washington Libraries
Box 352900
Seattle, WA 98195-2900
(206) 543-8409
(206) 685-8782 fax
[log in to unmask]
http://faculty.washington.edu/~aschiff
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~