Some of the titles I suggest will surprise you. Only three of the books I recommended to her (and now to you) are "how to get over a breakup" books. The other four contain life-altering wisdom or inspiration that can be even more useful than specific techniques to ex your ex.
Like it or not, we are all always changing and adapting to circumstances as time rolls on. The positive thing about change is that with some effort we can help direct some (though not all) of the change in our lives as opposed to being victimized by it.
I'm often struck by the opening sentence of a novel or short story. It can draw me in and set expectations for what's to come. This isn't always true, of course, but a story's first line is the author's opening salvo.