Weight Watch­ers is mark­ing its 50th year by shed­ding its old pub­lisher and hop­ing to expand its audi­ence for an anniver­sary cook­book. “Weight Watch­ers 50th Anniver­sary Cook­book: 270 Deli­cious Recipes for Every Meal,” will come out in May. The release starts a part­ner­ship between the diet com­pany and St. Martin’s Press. Weight Watch­ers had pre­vi­ously released its cook­books through Wiley. Accord­ing to a joint announce­ment Fri­day, the new cook­book will offer new and old recipes and “fun facts” on Weight Watch­ers his­tory. Weight Watch­ers and St. Martin’s plan another cook­book later in 2013 and more pub­li­ca­tions in 2014.

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