Does anyone know where I can purchase a strategy guide, either in book or pdf form, that has the game and expansions? Game pressure has a good guide, but it appears they are not selling a downloadable version, unless I missed it. Thanks!

The included strategy guide might be a little out of date what with all the rebalancing that's been going on.
Best bet would be something like gamebanshee / gamefaq guides

http://guides.gamepressure.com/pillarsofeternity/

https://www.primagames.com/games/pillars-eternity/walkthrough/pillars-eternity-side-quests-walkthrough-and-guide

http://www.eurogamer.net/articles/2015-03-26-pillars-of-eternity-walkthrough-and-game-guide-3690

http://game-maps.com/PoE/Pillars-of-Eternity.asp

http://pillarsofeternity.gamepedia.com/Pillars_of_Eternity_Wiki

http://www.ign.com/wikis/pillars-of-eternity

http://pillarsofeternity.wikia.com/wiki/Pillars_of_Eternity_Wiki

http://www.amazon.com/Pillars-Eternity-Prima-Official-Guides/dp/1101898232

http://www.amazon.com/Pillars-Eternity-Guidebook-Obsidian-Entertainment/dp/1616558091