Thanks, working!!

I can't see those options in the manual (15.10.4 Query Replace) and the help is a little bit obscure for me, a new rabbit hole to study ;D

Thanks!

Ypo writes on Sat 12 Nov 2022 15:42:
 > Hi
 > 
 > I am copy-pasting e-books into org-mode to read and study them.
 > 
 > Usually, words come hyphenated, like "ato- mized", that I wanted to 
 > transform into "atomized".
 > 
 > I am trying with query replace, but I am starting to think that it is 
 > not the correct tool for this job.
 > I tried "query-replace [a-z]-" but I don't know how to exclude the 
 > letter before the "-".

I don't really understand the thing with e-books but as for
transforming "ato- mized" (or "ato-mized") into "atomized", how about
something like

query-replace-regex

\([a-z]\)-[[:blank:]]*\([a-z]\)

\1\2