I can recommend a book on the Polish Forces in Exile, it's a little old
and it was given to me by my mother's friend
whose husband served as a "Cicho Ciemny"
The book is called Eagles in Exile by Pat Beauchamp Washington published
by Maxwell, Lowe & Co Ltd
it has a preface by Gen Wladyslaw Sikorski
Eastern Borderlands of II RP;
Outgoing mail is certified Virus Free