What do the books “The invention of Nature” and “De uitvinder van de natuur” have in common? Well, they are both different versions of the same work “The invention of nature” by Andrea Wulf, whether it is in a different format or a different language. In this blog post I will briefly introduce the advantages of keeping work-level records in library catalogs. Furthermore, I will introduce a fast Python implementation (DOI: 10.5281/zenodo.10011416) which we used in the BELTRANS project to identify the works in a corpus of book translations #FRBRization.