What ever happened to being able to right click on a book in Library and select "serach this resource" I realy miss that feature
You can do this from the search window. You may also just want to press "control f " while in the resource. That will display a "find box you can use to query the resource. I find it very helpful
I have utilized the Cntrl F feature for finding as well, but find that I wish they had a button to click as well. I was assuming that I could use Cntrl F after seeing there was no button to search the open resource. The magnifying glass icon is a universal icon for search and could be an easy button to insert.