Ultimately, the contract with the publisher necessitated that Bertholle be given a co-author credit, and the final profit split was 18% to Bertholle and 41% each to Beck and Child.
Volume 1 was immensely successful, and work on Volume 2 began around 1964, as a collaboration between Simone Beck and Julia Child, but not Louisette Bertholle. By the end of 1960, Beck and Child had grown frustrated with Bertholle because they felt she did not contribute enough to Mastering the Art of French Cooking to merit co-authorship and one third of the book's proceeds, and wanted Knopf to change the byline to read "by Simone Beck and Julia Child with Louisette Bertholle." Beck argued, "it is bad for the book for her to present herself as Author, as she really does not cook well enough, or know enough," and that Bertholle should only be entitled to 10% of the profits (to Beck and Child's 45% each). Ultimately, the contract with the publisher necessitated that Bertholle be given a co-author credit, and the final profit split was 18% to Bertholle and 41% each to Beck and Child. The dispute left Bertholle extremely upset, and effectively severed the professional partnership between herself and Beck and Child.[7]