adobe photoshop - Removing background and cut out and sharpen handwritten text

I'm scanning some old text my grandma wrote in a book. I need to remove the background and just keep the handwriting on a white background. I've tried the Magic Wand, but that way a lot of spaces in letters like o, a, e, etc stay in the color of the background. I've got like 50 pages to do, so is there a faster way to just separate this handwriting?