Quote:
Originally Posted by nepentanova
Is it possible to reduce the file size of this book in calbre by reducing the quality of the images?
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Did you try Calibre's tool for image compression? It does a good job and works very fast if the images are .jpg and not .png.
Edit window > Tools > Compress images losslessly
Select all the images and check "Enable lossy compresion." Try a setting of 50 first. After working, the Calibre dialog will report on before/after sizes. If this is not enough, try 30 or below. I favor a setting of 50 because the loss of quality at that level is impossible to detect even on the 300ppi Kindle.