Rainer Kress: Reconfigurable Computing:  Structural Programming with Reconfigurable Datapaths
This book is written with more focus on Xputer. by the way, the author R. Kress is the inventor of Kress array.
http://itpress.de/kress.htm
 

This book from amazon.com. I could not find more info about it
Reconfigurable Processor-Array : A Bit-Sliced Parallel Computer (Research Monographs
in Parallel and Distributed Computing)

Another book, but toward applications of RC, can be found at borders.com
High-Speed Computing, Digital Signal Processing, & Filtering Using Reconfigurable Logic
                                         Hardcover, 364 Pages, S P I E-International Society for Optical Engineer, October 1996
                                         ISBN: 0819423165  Editor: Watson, John / Schewel, John / Athanas, Peter M. / Bove, V. Michael

This is a very good article about RC.
http://www.netrino.com/Articles/RCPrimer/