If you don't have a reader app installed, you must enable Developer Mode in your phone's settings (Settings → Update & Security → For Developers).
If you already have these apps installed or can find their legacy .xap / .appx files, they remain the best options for the platform: skachat knigu na windows phone
: Older devices like the Lumia 540 or 1520 have limited RAM (1–2GB), which may struggle with very large PDF files or complex modern web pages. Top 5 e-Reading Apps for Windows Phone 8 If you don't have a reader app installed,
Since the store is inactive, you must rely on manual "sideloading" or using the browser to access content: : Methods to Get Books on Windows Phone
However, if you still use a Windows Phone, you can read books by manually transferring files or using third-party archives. Methods to Get Books on Windows Phone