Art is a highly diverse range of human activities engaged in creating visual, auditory, or performed artifacts— artworks—that express the author's imaginative or technical skill, and are intended to be appreciated for their beauty or emotional power.
Art may be characterized in terms of mimesis (its representation of reality), expression, communication of emotion, or other qualities. Though the definition of what constitutes art is disputed and has changed over time, general descriptions center on the idea of imaginative or technical skill stemming from human agency and creation. When it comes to visually identifying a work of art, there is no single set of values or aesthetic traits. A Baroque painting will not necessarily share much with a contemporary performance piece, but they are both considered art. 
The eBooks app features allows the user to :
 Custom Fonts
 Custom Text Size
 Themes / Day mode / Night mode
 Text Highlighting
 List / Edit / Delete Highlights
 Handle Internal and External Links
 Portrait / Landscape
 Reading Time Left / Pages left
 In-App Dictionary
 Media Overlays (Sync text rendering with audio playback)
 TTS - Text to Speech Support
 Book Search
 Add Notes to a Highlight
 Last Read Position Listener
 Horizontal reading
 Distraction Free Reading
Credits :
Boundless (Creative Commons Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0))
FolioReader,  Heberti Almeida (CodeToArt Technology)
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www.learnpro.id