There are no good books on programming Crystal Reports. Some of the "using" type books devote two or three chapters, but don't get to the detail level needed. A few months ago, Whil Hentzen made a post that he was looking for a tech editor for a Crystal book. You might want to follow up with him.
>Craig,
>
>Do you know of any helpful books I can use for assistance in
>programming Crystal Reports?
>
>Thanks
Craig Berntson
MCSD, Microsoft .Net MVP, Grape City Community Influencer