IMSLP Forums

I would like to know if this book is copyrighted
Oscar Beringer: Daily Technical Studies for Piano.
At the same time I would to ask if there is a way to know if a work or book is copyrighted, or I have to ask the question here in all cases I had a doubt?
Sometimes, the book or composition itself is not anymore under copyright laws, but the bookmaker, the publishing house has the copyright about this product, so it gets a bit more complicated.
Thanks for the attention.

The book should be PD in all relevant jurisdictions as it was first published in 1905. There is a Kalmus reprint available which should confirm US PD status

Please, what does "PD status" mean? What is PD?

PD = public domain. Iam realizing that now.