Edelweiss+ is an industry site that aggregates book publishers' catalogs and allows you to create and manipulate lists of titles. These are all mainstream or reputable independent publishers with both new frontlist and older backlist catalogs. Ultimately, you can select from these virtual catalogs and take the list of ISBNs you create, load them into an Excel spreadsheet, and submit the list of ISBNs to OASIS. This is one way to avoid nasty surprises when you order. The downside is that the prices in Edelweiss are probably not going to be accurate when the title(s) are ordered through OASIS or Amazon. See below for video tutorials and articles on using Edelweiss+ in a library setting.
Registration and navigation for Librarians
Visual guide to downloading digital review copies