EPUB is an e-book file format with the extension that can be downloaded and read on devices like smartphones, tablets, computers, or e-readers.

It is a technical standard published by the International Digital Publishing Forum (IDPF).

The term is short for electronic publication and is sometimes styled ePub.

EPUB became an official standard of the IDPF in September 2007, superseding the older Open eBook standard.

The Book Industry Study Group endorses EPUB 3 as the format of choice for packaging content and has stated that the global book publishing industry should rally around a single standard.

EPUB is the most widely supported vendor-independent XML-based (as opposed to PDF) e-book format; that is, it is supported by the largest number of hardware readers.

Fantasy is a fiction genre set in an imaginary universe, often but not always without any locations, events, or people from the real world.

Most fantasy uses magic or other supernatural elements as a main plot element, theme, or setting.

Magic and magical creatures are common in many of these imaginary worlds.

Fantasy is generally distinguished from the genres of science fiction by the expectation that it steers clear of scientific and macabre themes, respectively, though there is a great deal of overlap among the three, all of which are subgenres of speculative fiction.

An electronic book (or e-book) is a book publication made available in digital form, consisting of text, images, or both, readable on the flat-panel display of computers or other electronic devices.

Although sometimes defined as "an electronic version of a printed book", some e-books exist without a printed equivalent.

Thriller is a broad genre of literature, film and television, having numerous subgenres.

Thrillers are characterized and defined by the moods they elicit, giving viewers heightened feelings of suspense, excitement, surprise, anticipation and anxiety.

Successful examples of thrillers are the films of Alfred Hitchcock.

Genre (or; from French genre, "kind" or "sort", from Latin genus (stem gener), Greek γένος, génos) is any form or type of communication in any mode (written, spoken, digital, artistic, etc) with socially-agreed upon conventions developed over time.

Genre is most popularly known as a category of literature, music, or other forms of art or entertainment, whether written or spoken, audio or visual, based on some set of stylistic criteria, yet genres can be aesthetic, rhetorical, communicative, or functional.

Genres form by conventions that change over time as new genres are invented and the use of old ones is discontinued.

Often, works fit into multiple genres by way of borrowing and recombining these conventions.

Stand alone texts, works, or pieces of communication may have individual styles, but genres are amalgams of these texts based on agreed upon or socially inferred conventions.

Some genres may be rigid with strictly adhered to guidelines while others may be very flexible.