This is our current favorite for an all around instruction book for sea kayaking. Clear text and helpful illustrations for a variety of topics for paddlers of every skill level.
Sea Kayaker Magazines' Handbook of Safety and Rescue Doug Alderson and Michael Pardy
Learn how to make the right decisions in tough situations, choose the right safety and rescue equipment, and develop the skills and stamina you'll need to rescue yourself and others under perilous conditions.
Current Atlas Juan de Fuca Strait to Strait of Georgia Canadian Hydrographic Service
A good visual guide to the tidal currents of the San Juan Islands, Gulf Islands, Strait of Juan de Fuca and Strait of Georgia. Perpetual atlas for use with Washburne's Tables.