The spine of your volumes will contain the title of your Series, the volume number and the date range of the photos in that specific volume.
You can always change the title of your Series, but do note that the new title will only be printed in the new volumes (unfortunately, we cannot change the past). You can’t change the volume number in your Series, as the books are intended to be a growing collection of your favourite photo memories.
The date range displayed on the spine of the book is taken from the date in the metadata of the photos in your volume. Sometimes your photos can end up with an incorrect date, particularly if the photos were taken with a professional camera or shared via social networks, such as Facebook or WhatsApp. You can easily change the date of your photos, which will ultimately change the date range on the spine of your book.
To change and/or add a date to a photo in your Series, simply tap on the photo and then tap on the button “Date / Location.” Select a new date for your photo and then tap “Done”.