Peter Huber & Alastair Mullis 
CISG [PDF ebook] 
A new textbook for students and practitioners

"… there is a lack of a clear and simple exposition of the CISG for students and practitioners. That is the role of the current book, which it fills admirably. All of the issues that have been raised in the cases and the literature are considered, but without excessive detail. This is a book that will do much to make the CISG an easily understandable text for all users, student and pracitioner alike."Preface by Professor Eric E. Bergsten