Your tool can't read a file

I'm trying to read mobi file like in readme, but I get unreadable mess in output, like this:

> 601041161091086260104101971006260103117105100101626011410110210111410111099101 t12111210161341161119934 t1051161084 t849798108101 o102 C11111011610111011611534 f10510810111211111561484848495050505049573247626047 C1111147 o102 9811110012162601001051186260112 h10110510310411661344811211634 w10510011610461344910110934 a10810510311061341061171151161051021213462847279776583 P897867727978604711261341061171151161051021213462847279776583 P8965 N11111810110

how can I fix this?

Start by reproducing the MOBI-reading example referenced in the README and compare its output with the unreadable text shown here. Trace how that example reads and decodes the file; the issue is done when the same unencrypted MOBI input produces readable content.

Written by the indexing model from the issue text.