The new book by Bogdan Wiśniowski is a monograph of Chrysididae of Poland. It was published in 2015 as the second volume of the series of books on Polish Hymenoptera Aculeata. Another volume will be published in 2017.
Some more information about the book you can find here:
Cuckoo-wasps (Hymenoptera: Chrysididae)
In 2009 Bogdan Wiśniowski published a book on Polish Pompilidae. This is the first monograph of Polish spider-hunting wasps, and the first of the volumes of Polish Aculeata planned by the author.
Some details about the book are presented here:
Spider-hunting wasps (Hymenoptera: Pompilidae) of Poland
I am starting this site to promote images, books and information about Polish Hymenoptera as well as other insects. The site is currently under construction; the information will be published gradually. I hope you will like it!