The top tools, best resources for administrative assistants can be found here!
Check out "Who Took My Pen... Again? Secrets from Dynamic Executive Assistants. It is a book for executive assistants written by executive assistants.
Read Your Way Out of Your Cube: 30 Books for Admins’ Continuing Education
Laughing All the Way to Work: A Survival Blog for Today's Administrative Assistant
The New Executive Assistant: Advice for Succeeding in Your Career
Building a Partnership with Your Boss (A Take-Charge Assistant Book): Jerry Wisinski: 9780814470138: Amazon.com: Books
Musings of a High-Level Executive Assistant