If you haven't been on Twitter in the last few days, you may not know about the new header option they've made available. You will need to upload a photo or graphic image with maximum pixels of 1252 x 626 at 5MB. Don't bother putting a lot of text in the middle of your image to promote your next book or yourself. Twitter will automatically place your photo ID in the middle with the info you provided in your bio. You can upload the new header image when you login to Twitter and go to the Edit Profile section.
I think this is a better way to personalize your Twitter page to give it the "look" and "feel" of who you are. In my case, I pulled a similar photo I had used in my FB header and placed my new upcoming book, Path of Freedom on the side. Below is a screen shot of what my new Twitter header looks like on my page--for now.