A colleague mentioned he was about to embark on a new internal IT project involving Sharepoint - and a quick check on Packt Publishing's web site led me to the following interesting titles...
Microsoft SharePoint 2010 Administration Cookbook
Microsoft SharePoint 2010 Business Performance Enhancement
Integrating Silverlight 4 with SharePoint 2010
SharePoint Designer Tutorial: Working with SharePoint Websites
Microsoft SharePoint 2010 Administration: Farm Governance