If you want to merge multiple PDF files into one, there are multiple ways to do that on Windows 11. You can use a free ...

Export PDF metadata using File > Export Metadata Records to Text File. First, download and install this free software, AutoMetadata. Then, launch the main GUI on your Windows 11/10 PC. Next ...

Its free plan lets you convert 25 files per day, and each file is given 5 minutes of conversion time. I guess the limit is satisfactory. Use this link to open this ePub to PDF converter tool.