SharePoint 2010 - Some good books I refer!

1. Sams.Microsoft.SharePoint.2010.Unleashed.Oct.2010
2. Manning.SharePoint.2010.Web.Parts.in.Action.Apr.2011
3. Wrox - Professional SharePoint 2010 Development.
4. Microsoft.Press.Using.Microsoft.InfoPath.2010.with.Microsoft.SharePoint.2010.Step.by.Step.Oct.2011

Hope this helps...