Whats a good guidebook for Costa Rica?
Though this is a LP forum, there a few more detailed books depending on your travel goals. I highly suggest MOON-Chris Baker. If you want to know the Ins/Outs, and plan on going to multiple areas, on multiple modes of transportation, this is the book. Its by region, then budget, with the MUST SEE/DO at front of each section. Chris Baker is the expert on CR, and has been discovering CR for decades, long before the country became a tourist destination it is now. He also is the author of National Geographic Explorer Costa Rica. I also recommend Rough Guide, for the backpacker/budget well seasoned types.