Book for 642-813

When I passed the switch exam (BCMSN), I used the Cisco Press Exam Certification Guide, Jeremy's CBT Nugget videos, and practiced on a couple lab switches.

The equivalent book is here:

If you need more foundation information, they have the foundation learning guide. Just depends on where you are at with the technologies. Here's link to the foundation guide:

And also good to check out the learning objectives for the test:
http://learningnetwork.cisco.com/docs/DOC-6569

I have yet to read a book that is perfect, there are errors in all of them. Speaking from experience, the information in the exam certification guide is well laid out and helped me identify the topics I needed to focus on to pass the exam.

That said, I definitely supplemented the material in the book with hands on practice and material from cisco.com. At the time, I had a stack of old 3548xl and 3550 switches I had pulled out of a building after an upgrade, so I used those to practice various spanning tree and hsrp configurations. I'd recommend finding a way to practice the commands you learn as you learn them. Don't just read the material and hope to pass the exam.

Also, for just about every technology the book covers, there is most likely a more in-depth whitepaper on cisco.com that explains the technology in depth. I'd recommend reading the book and then supplementing what you've read with online docs. Here's a link to the 3560 configuration guide, it provides syntax on how to configure most if not all of the stuff that's on the switch exam: http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/relea...

Finally, don't be discouraged if you feel totally prepared, but then don't pass the test. If you fail, immediately after leaving the exam center, think of as many things on the test that you struggled with and jot down notes. Then use that information to go back and study. Also, use the printed report that the testing center provides you and study the areas that are not 100%. Get more hands on practice with every technology. Go through the official exam objectives and honestly score yourself on each area. Anything you don't feel 100% on, read through the material again and get more hands on practice. The second time you take the test, you should be well prepared to pass.