For severe performance issues, microG's lightweight architecture provides an excellent alternative

Load offline PDFs and EPUB files into a lightweight reader app like FBReader.

If you're running a custom ROM on your KitKat device, flashing a GApps (Google Apps) package is often the most reliable method. GApps packages bundle Google Play Services, Play Store, and other Google frameworks into a flashable ZIP file.

Play Services alone won't give you the Play Store. You'll need to install the Play Store APK as well