Publishers will want to be sure that you have all the rights to what's included in the book, and if you have published parts of it elsewhere this may be an issue.
Often, after some thoughtful consideration and discussion, it is simply quietly assumed that you indeed are in control of all parts of the manuscript, and so the issue is done.  The publisher will undoubtedly acknowledge them on an "Acknowledgments" page or appropriate section in the book.
Just as often, however, a publisher wants to be quite sure, and will ask you to get permission from the various places you have published any of the manuscript's parts.  This is some work, but it is usually pro forma--that is, it is regularly done.  A simple letter to each of your previous publishers asking for permission is enough.  They will almost invariably write back granting that permission, or reaffirming that you are in control of all reprint rights.  They will ask, however, either as a stipulation or as a courtesy, that you acknowledge them in your book.  Your publisher expects to do this, and so it is, essentially, a happy circumstance.  Indeed, journal publishers will want to claim you in their journal's good news, and you may start to see your name in advertisements for their journal.  They will also be the first likely reviewers of your book.

  • ADVICE. Some appropriate wording for a permissions letter might be: Dear X: My book, Yowza Magowza, has been accepted for publication by You Betcha Press.  They are asking that I write to you and ask for permission to reprint.  Of course, you will be acknowledged in the book.  Thank you for your