all is in the title
for myself a made a quick-fix
in wuxiaworld2ebook.py, function button_press()
line 40-41
if name in i[0]:
raw_info.append(i)
became
if name in i[0]:
if 'disabled' not in book_number_chosen.state():
g = list(i)
g[0] += '-book{}'.format(booknr)
i = tuple(g)
raw_info.append(i)