A couple of really, really good books are "Polish Roots" by Rosemary A. Chorzempa, and "A Translation Guide to 19th-Century Polish-Language Civil-Registration Documents", by Judith A. Frazin. The first one is readily available, probably on Amazon (or through Ancestry.com), and the second one is only easily available through the Polish Genealogical Society of America (at pgsa.org).TRUE
, I have even payed for the services in Cyndi's List but we found nothing in concrete.
I agree with your comments, for years we tried to look for any family in Poland but the lack of the language is always a wall. Reading in the linkedin genealogist forum I found the contact of a consultancy company that for 10 euros found the original birth certificate of my grandfather, and thanks to this information we found the whole family! I personally was calling to the local church with the help of a local polish guy and spent money in Ancestry com but no results, only these guys were able to read the realstate documents, find names and find the birth certificates.
This summer will be the second visit and we will start with a heritage process. You guys may ask them for advice, their website is: castaneda com pl, there you can find their contact. I think all possibilities
should be explored.