You really need 2 sets of books. First, if you are going to do some serious planning, then before hand, read at least one memoir. Larry Luxemburg’s is a good one, but there are several, (and I have several). Also, read Trail Journals. Your other planning books include the AT Data Book, Companion or Wingfoot’s Handbook, and Chris Whalen’s Workbook for planning thru-hikes.
While on the trail, I carried maps and pages from Wingfoot. The only place I saw guidebooks was discarded in hiker boxes along the way. I didn’t carry the data book because Wingfoot has the mileages in his publication.
I used maildrops to get new maps and additional pages from Wingfoot, and to send back old maps.
One word of note on Wingfoot and the Companion. Unless you want to see the same mistakes published again next year, take the time to send corrections to Wingfoot or to ALDHA.
Peaks