How to create and index of photos at the end of my book

There's no way to "automatically" add an index table in the LR book module. However, you can add "automatic" photo titles using the 'Text' panel. Where are you entering the photo titles for each photo?

You will have to make the index manually.

> First make your index in a text document

Then:

> Select automatic numbering under the page tab.

> Select the page to be used for the index and click the “Change Page Layout” icon.

> Scroll down to text pages and choose the first one for free flowing text.

> Copy index from text document and paste nto the text cell.

Nothing found in a Google search. There is a 4 year old request for this capability where you can add your 'Me To' vote. A new request here will get more attention, but it's probably low on Adobe's list of new features.

Lightroom: Book module and page numbering; building indexes and table of contents | Photoshop Family Customer Communit…

John Beardsworth has written a script that will create a list of image filenames.

Filenames – Lightroom Solutions

Select the images in a (book) collection and run the script- it shows the filenames, comma separated, that can then be copy/paste into a word/text editor table or a spreadsheet. This can get a book index part the way saving much typing of filenames, just add the page numbers and sort the table as required.

It works great for filenames, and in the link above, John talks about modifying the script to list another metadata field (eg. Title) but I cannot give "qualified" advice on this, however I was able to edit the script and have it list Titles successfully.