i-DeClone uses author and book title information to identify and compare e-Books using a fuzzy AI algorithm. If your books have good tag information, any duplicates will be found.
Step by step instructions:
➀ Connect devices to scanIf you want to scan external disks, connect them, or just scan your PC folder contents. Click on Start scan toolbar button to begin. Then click Start new project to setup scan settings from scratch.
➁ Scan options
Set the scan category to e-Books and the folder to search to whichever folder you keep your books, or something generic like My Documents or your entire PC
Set the scan mode to Find similar files and the tolerance percent level. You may have to experiment with this number a few times (use revise scan command) to find the best level, especially if your books vary too much in size.
If you want to discover the same books in various formats as well (EPUB,AZW,MOBI,PDF...) switch to Advanced property page and clear the option Files must have same extension. Note that e-Books cannot be compared by text content, only by author/title tags. If your book collection is mostly PDFs, you may have better results using document text comparison scans.
All set, click Start scan and wait for the results.
➂ Mark and remove duplicatesUse the checkboxes to mark duplicate items for removal, then remove them to clean up space. Use Mark wizard to choose the originals (which will be kept) depending e.g. on their folder location. Finally click Clean-up button to start deleting the marked duplicates. This is a standard procedure explained in detail in the documentation