As ISBN's can be entered with or without hyphens, using exposed views filters on ISBN fields (e.g.: filter fields that "contains" ...) is not a viable option: entering "7137" in the filter box will not catch ISBN's ending with "713-7". A "Remove hyphens" option would help.
Comments
Comment #1
skizzo commentedIt could be a "clean" option similar to the one provided in ISBN display (dashes and spaces removed)
Comment #2
sashi_gangaraju commentedSubscribing !!