I'm currently a R5 CLP Administrator and wanting to becomes a CLP developer. Can you recommend any good text book apart from the IBM redbook ?
Lotus have just announced a new book by Libby Ingrassia Schwartz, titled "Lotus Notes and Domino R5 All-In-One Exam Guide". This book is comprehensive in it's coverage of the exam requirements and learning outcomes from the entire Lotus certified professional stream.
I would also thoroughly recommend the Lotus Yellow books (Developers Document Pack) which can be ordered from the lotus web-site, not so much from a learning perspective, but as reference guides to assist in grasping the concepts, objects and languages behind programming Lotus Notes applications.
Have a great journey...