R6

Upgrading to Lotus Notes and Domino 6 - IBM Redbooks
Special Edition Using Lotus Notes and Domino R6 - Jeff Gunther, Randall Tamura
Lotus Notes and Domino R6 Development Unleashed, Second Edition - Steven Kern, Deborah Lynd
Mastering-Lotus, Notes/Domino 6 - Cate McCoy, Matt Riggsby, Scot Haberman, Andrew Falciani
Domino and Websphere Integration on the IBM Iseries Server - IBM Redbooks
Lotus Domino 6 for Linux - IBM Redbooks, IBM Redbooks
Lotus Domino 6 for Z/OS: Performance Tuning and Capacity Planning - IBM Redbooks
Lotus Domino 6 Spam Survival Guide for IBM - IBM Redbooks, IBM Redbooks
Coexistence of Multiple Lotus Domino Releases in an Lpar Environment on the IBM Iseries Server - IBM Redbooks
IBM Lotus Domino 6 for Iseries Implementation - IBM Redbooks
Migrating from Microsoft Exchange 5.5 to Lotus Notes and Domino 6 - IBM Redbooks
Integrating Lotus Domino 6 and Websphere Express V5 on the IBM Eserver Iseries - IBM Redbooks
Implementing IBM Lotus Enterprise Integrator 6 - IBM Redbooks, ANDRE GUIRARD
Implementing IBM Lotus Enterprise Integrator 6 on the IBM Iseries Server - IBM Redbooks, LANDON DEB
Lotus Domino 6 Multi-versioning Support on the IBM Iseries Server - IBM Redbooks
Best Practices for Lotus Domino on System Z Z9 And Zseries - IBM Redbooks
Domino 6 for Iseries Best Practices Guide - IBM Redbooks
Image and Workflow Library: Integrating IBM FlowMark with Lotus Notes - Austen Chihming; Muhlberger, Ralf; Begovac, Tomislav; Ebbers, Mike Lin
Lotus Domino Administration in a Nutshell A Desktop Quick Reference - Neilson, Greg