I have seen a portion of the index for the book on ccwatershed. Maybe someone could copy the whole thing including the authors and other parts like that into a pdf so I could see what exactly is in it. I wonder if maybe it is possible for someone to put it in the internet archive as for members so the copyright issue wouldn’t be the same. Or if someone could just email me a pdf so it wouldn’t be public. I don’t know what is best but I am interested in much of its contents.

As a nun of the Summit Monastery I would like to comment on CGM's remarks about why we are not republishing the Choirbook at this time.
First, like the Dominican Rite, the Summit Choirbook was intended more for the use of Dominican communities rather than the general public. Reviewers of the hymnal have often been very hard on this hymnal misinterpreting its use and questioning why anyone in a parish would want to sing so many hymns for Dominican saints.
It does not have Mass Ordinaries. Again, this isn't a parish hymnal. Only the 1st stanza is under the music. This was done for several reasons as explained in the preface. The major reason was cost because at the time typesetting music was very expensive.
There are many mistakes that need correcting should it be republished and probably a number of hymns that would be removed.
Many Dominican communities find this hymnal too difficult or pitched too high. As someone who probably could sing every single hymn in my sleep, I of course, think otherwise!
There is music from the Eastern rite which had an influence on the community in the 70s and 80s and even when I entered we were having the Ukrainian mass several times a year. We continue to sing Tropars, Kondaks, etc.
The hymnal was the enormously hard work of MANY sisters, not just Sr. Maria, although she was the main editor and expert behind it. But it would never have been finished without the prioral encouragement of Mother Marie Rosaria and Mother Mary Albert and the the hard work of other sisters, some who have gone home to God and others who are still alive.
At the time the Choirbook was published it was seen as a "niche" hymnal which is why it was published by the monastery at enormous expense and since that time many fine hymns books are now on the market.
Please PM me and I will see what I can do to help you.

JP, if you're at a Dominican parish whose choir has copies of the hymnal, chat with the choir director or the organist. Perhaps he or she will lend you one for personal use.

Ask if you might check it out, as if from a library, for a specific period of time (say, one month), and then return it promptly; at some later point, you might ask to check it out a second time, if you want to peruse its contents further.

I have heard about the inter-library loan option already. I haven’t heard about the exact method that chonak describes. I have a few other things I am following up on before I would resort to doing that. As to what CGM said, as far as I know my parish only has one copy of the book but they use that to make copies for the choir. A few forum members have offered to send me a pdf. Thanks for all of your suggestions.

I have a copy. It is a MAGNIFICENT hymnal.

Thanks for the article! There is nothing there about the Benedictine Order. It does say Sr. Maria was prioress, which she wasn't.
There was a first draft that was hand written, printed and bound at the monastery.
In the archives are boxes of cut and paste pages for published version.

I sent them a polite email a couple weeks ago regarding the inaccuracies in the article, and they've since incorporated the corrections.