Trump, who became the presumptive Republican nominee earlier this month, released a video on his Truth Social platform on Tuesday urging his supporters to buy the "God Bless The USA Bible", which is inspired by country singer Lee Greenwood's patriotic ballad.
Trump takes the stage to the song at each of his rallies and has appeared with Greenwood at events.
"Happy Holy Week! Let's Make America Pray Again. As we lead into Good Friday and Easter, I encourage you to get a copy of the God Bless The USA Bible," Trump wrote, directing his supporters to a website selling the book for $US60 ($A92).
The effort comes as Trump has faced a serious money crunch amid mounting legal bills while he fights four criminal indictments along with a series of civil charges.
Trump was given a reprieve on Monday when a New York appeals court agreed to hold off on collecting the more than $US454 million ($A695 million) he owes following a civil fraud judgment if he puts up $US175 million ($A268 million) within 10 days.
Trump has already posted a $US92 million ($A141 million) bond in connection with defamation cases brought by the writer E Jean Carroll, who accused Trump of sexual assault.
"All Americans need a Bible in their home, and I have many. It's my favourite book," Trump said in the video posted on Truth Social.
"I'm proud to endorse and encourage you to get this Bible. We must make America pray again."
Billing itself as "the only Bible endorsed by President Trump!" the new venture's website calls it "Easy-to-read" with "large print" and a "slim design" that "invites you to explore God's Word anywhere, any time".
Besides a King James Version translation, it includes copies of the US Constitution, the Bill of Rights, the Declaration of Independence and the Pledge of Allegiance, as well as a handwritten chorus of the famous Greenwood song.
The Bible's website states the product "is not political and has nothing to do with any political campaign".
Trump remains deeply popular with white evangelical Christians, who are among his most ardent supporters, even though the thrice-married former reality TV star has a long history of behaviour that often seemed at odds with teachings espoused by Jesus Christ.
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