If you're planning to deploy SharePoint 2013 then the below guides may be helpful to you:

1) Deployment Guide for SharePoint 2013 - Preview

http://www.microsoft.com/en-us/download/details.aspx?id=30384

2) IT Professional Reviewer's Guide for SharePoint 2013 Preview

http://www.microsoft.com/en-us/download/details.aspx?id=34023

3) SharePoint 2013 Preview Upgrade Process

http://download.microsoft.com/download/C/3/4/C342C7FA-521A-4DE8-B5CE-6A507CB354D3/sp2013-upgrade-process.pdf

4) Topologies for SharePoint 2013 Preview

http://download.microsoft.com/download/A/0/7/A07928F6-5153-4E19-B682-B8D28194095A/sps-2013-topology-model.pdf

5) SharePoint 2013 Preview: How to Test Upgrade

http://download.microsoft.com/download/2/6/1/26107A7E-C7C7-4B29-A598-4BDAE3B5DF3E/sp2013-upgrade-testing.pdf

6) SharePoint 2013 Preview: App Overview for IT Pro

http://download.microsoft.com/download/2/2/F/22FF5430-13E7-431F-8980-C7B95CCF3C26/sp2013_apps-overview.pdf

7) Deployment Guide for Duet Enterprise for Microsoft SharePoint 2013 Preview 

http://download.microsoft.com/download/B/9/1/B915206A-6DF6-4156-8DBF-586E639648D5/Deployment-guide-for-Duet-Enterprise-2.0-Preview.pdf