A die crack or break is not a
Cud unless it involves a piece of the die missing from the edge that leaves an area of the coin unstruck. What you have is a very small die crack.
The lines on the reverse look like light die damage that struck into the coin.
What you have will not be listed in any book. For a book to list all of the minor anomalies dies obtain while striking coins would take volumes and volumes numbering hundreds of thousands of pages...it's not only probably not possible to do, but is unwarranted because of the lack of general interest in such minor imperfections that are considered a normal part of the minting process.
Jean Cohen attempted such a thing with the
Lincoln Cent back in 1967. Fewer than a tenth of the
Lincoln Cent anomalies were listed and the book is nearly two inches thick. Nobody has since bothered.
The book I am working on will be the largest numismatic book ever produced, will number more than 2,500 pages and more than 12,000 images and doesn't include ANY die cracks, gouges,
Cuds, or other minor anomalies...all my book contains is
Lincoln Cent die variety information - only doubled dies and mintmark varieties. To even attempt to list all dies used (all dies gain anomalies of some sort in their lifetime) would make the task impossible for one person to accomplish in a lifetime.