Your first step should be to find the trade magazine Publisher's Weekly in your local library. PW reviews most new fiction, especially books by established authors. I did a search and found out that PW did review Crichton's Next in the Nov. 20, 2006 issue.
If you can't find Publisher's Weekly, then look for The New York Times Book Review. This publication reviewed Crichton's book in January 2007.
You might also check the archives of Library Journal.
Each of the periodicals I've suggested have online editions; I've placed links to them in the sources section. I hope this helps.