The annual event, at the Polish capital's Palace of Culture and Science venue, is expected to be attended by exhibitors and authors from across the world, including countries as far afield such as China, India and South Korea.
Meanwhile, Ukraine is the event’s guest country of honour, taking part under the motto "Millions of Bridges."
According to the organizers, the motto of Ukraine's presence at the fair highlights the fact that, while Russia's invasion has destroyed Ukrainian towns and killed many civilians, it has built millions of bridges between ordinary Poles and Ukrainians.
The Ukrainian stand at the fair will showcase a cross-section of contemporary Ukrainian literature. More than 20 writers and members of the country’s cultural scene will take part in meetings, literary discussions and book-signing sessions.
Ukrainian publishers are set to share their experiences of how the war in their country has affected their business.
The programme of the fair includes a joint Polish-Ukrainian project called "The Power of the Word." It is a series of bilingual panel discussions by writers, journalists and intellectuals from the two countries focusing on the role of literature in fostering values such as freedom, dignity, honour, courage and a sense of community and solidarity.
At a press conference promoting the event last month, the Ukrainian ambassador to Poland, Vasyl Zvarych, asked Polish publishers to support their Ukrainian counterparts and to work together "on the common literary front."
"As Ukrainians, we want our books to become more and more popular in the world so that Ukrainian authors are read in foreign languages," Zvarych said at the time.
He added that "many Ukrainian books have already been translated by Polish translators," which he said was "an expression of solidarity" amid Russia's invasion of his country.
He told the press conference that Ukrainian literature was being extensively translated into other languages in a project overseen by Ukraine's First Lady Olena Zelenska.
Thursday is day 455 of Russia’s war on Ukraine.
The Warsaw Book Fair runs until Sunday.
Source: IAR, PAP
Click on the audio player above to listen to a report by Radio Poland's Agnieszka Bielawska.