just print off the water report for the first 700 miles and annotate it with your own notes that you can get from other hikers. After that the Data Book is all you need. The PCT is hard to get lost on. Usually just the shear volume of tracks on the PCT and all the hiking pole drags will lead you the correct way at intersections.
Erick the Blacks guidebooks are kind of out of favor with hikers since they offer misleading info. He hiked in 07 and lists water caches that were there in 07 as a source when they actually don’t exist today. Plus he tells you to camp in illegal spots next to small streams in the desert, and other irresponsible things that should never be in print.
Halfmiles maps are awesome and free. They are just costly to print though. You might want these for the Sierras though if you want to navigate through snow covered trail.
The wilderness press guidebooks are great sources of all kinds of info, but they are heavy. I have used these and have learned to appreciate the maps, when once I thought they were inadequate. The excessive info on all the natural history and stuff does add weight, but is good reading.
Yogis is a great book, Though expensive. Yogis guide will actually make a new hiker feel confident about starting. I read and re read her guide before my PCT 07 hike. She also has a data book included in her guide. There is great entertainment value in some of her water source descriptions. “Gross Disgusting water” was usually a pretty decent source after seeing the nasty ones the desert offered.
Guino