This contains the seventeen letters written by Henry VIII to Anne Boleyn between c.1527-1528, plus her letter to Wolsey with Henry's postscript. There are brief notes at the end and some short bibliographical information. While the text notes that nine of these letters were originally written in French, it doesn't indicate which ones.
The original letters are now in the Vatican Library (most likely stolen by either the Imperial or Venetian ambassador) and, since they were undated, there is much debate about the dates, and order in which they were written, so don't take what we're given in this edition as in any way fixed, accurate or stable.
So overall this is a perfectly workable edition of the letters, but if you're referring to them in any kind of academic context you will need to cross-reference them with a more scholarly source such as the Harleian Miscellany or the edition by Muriel St Clare Byrne - oh and, ideally, read the French letters in the original.