<p>My daughter had to purchase that same package for bio last year, and the previous posters are correct about the ISBN number. It was an ISBN for the package of books and clicker that were shrink wrapped together. I do recall that the bookstore sold the clicker packaged individually as well, but not sure the price. The 2PBS might refer to the format of the book (2 paperbacks, perhaps?) Last year, the bio books were labeled “binder ready”, which meant the pages were loose with 3 holes punched down the left side. It really was not a book, as there was no binding. The intent was for students to put the pages in a binder as needed.</p>
<p>You may want to look for a used Chem book as that was an expensive one, over $200 as I recall. Last year it was a new edition, so Used books were not an option. Should be plenty of those available at the Get Used bookstore or Pitt bookstore. If you place the order with the bookstore online you can request either new or used. They are pretty good with fulfilling specific requests.</p>