With any luck, Timothy Smith's Shiloh: Conquer or Perish should be greeting me at the mailbox any day now. The table of contents has recently been uploaded at the link provided. Just going from the chapter titles, it looks like the second day action begins on page 252 of a narrative running over 420 pages. As promised, that's a good chunk of text devoted to the neglected Monday fighting.
I still think Shiloh: If They Were A Million would have been a snappier title.