* ssReader to pdf
1. download and open the book with sspreader
2. click every page with 按键精灵
not work for English version Windows 10
3. copy the temporary images located in the following folder:
C:\Users\Administrator\AppData\Local\Temp\Buffer
which can be opened by typing the following command
%appdata%
4. change images to pdf
a. Windows
using =FreePic2PDF=, which can be downloaded [[https://yun.baidu.com/s/1qXFS9dy#list/path=/][here]]
b. Ubuntu
use =gscan2pdf= package
https://itsfoss.com/convert-multiple-images-pdf-ubuntu-1304/
5.bind the pdfs with software =PDFBinder=