In Light Room 4, once a book has been started you can only currently use photos from a specific folder, rather than being able to flick from folder to folder and add to the one book. Why is this? In most other book creating softwares you are able to select photos from a number of different folders. The scenario - I was creating a wedding album and upon completion the bride had asked if I could add a few photos that were taken by her guests, she emailed them over and I imported them and edited them in LR 4, however I find that whenever I click on the book section to edit my current book, it keeps setting up a new book leaving me unable to add the new photos to the existing book and being placed with the unhappy prospect of starting from scratch for a handful of photos!! Is it possible to add this to a future update?