I recently received a short introduction to data exploration for RapidMiner, “Exploring Data with RapidMiner” by Andrew Chisholm. This short book is a tutorial for data exploration using the RapidMiner interface. It’s more of a user manual than a book on data exploration. In each chapter, a quick (and general) introduction precede RapidMiner steps and screenshots. The target audience is beginner level. To be noted the interesting chapter about outliers. I would advise this book if you start with both data exploration and RapidMiner.