If you are fine with just converting the file format (without making the text searchable (via OCR as pointed out by Jonathan Ben-Avraham), this will be a perfect task for
convert from the ImageMagick package (available for various platforms: Win, Linux, Mac).
Simply use that command to convert your multi-page TIFF file
convert multi-page.tif book.pdf
However, you should employ the
-compress Parameter. If you have a 24bit colored TIF, you can use
LZW (lossless) or
JPEG (lossy), e.g.
convert -compress LZW multi-page.tif book.pdf
If your TIFF is black and white (please make sure, it is really saved with only 1bit colordepth), I usually use
Here is an example for a 5 page sample file, with some text in it -- the actual ratio between the compression algorithms depends of course on the content of your file:
24bit JPEG: 1294kB
24bit LZW: 1759kB
1bit Fax: 135kB
After that conversion you still can run a OCR tool (like Adobe Acrobat Pro) to make the text search- and copyable.