As the government prepares to publish the first of its series of documents setting out the consequences of leaving the EU with no deal, the Sunday Express says the battle lines are being drawn in the quest for Brexit.
The paper's lead story reports that up to 100 Tory MPs are preparing to rebel against Theresa May's Chequers plan.
It says Brexiteers have demanded she instead study an alternative plan they believe will deliver the Brexit the UK voted for.
The paper adds that MPs led by Jacob Rees-Mogg are preparing the alternative proposal, to be published in the next fortnight.
On the other side of the argument, the record £1m donation to the People's Vote campaign for a referendum on the final Brexit deal, makes the Observer's main story.
According to the paper, Julian Dunkerton - co-founder of the Superdry fashion label - said that if Brexit had happened 20 years earlier, his brand would never have been a success.
But the paper warns that supporters of a new vote face a race against time before Britain ceases to be an EU member at the end of next March.
"Racists flock to Boris on Facebook", is the main headline in the Sunday Times.
It says Boris Johnson is at the centre of a new row over racism after an investigation into online abuse revealed his official Facebook page hosts hundreds of Islamophobic messages.
Under entries that publicise Mr Johnson's articles and speeches - the paper adds - his followers have left comments including calls to ban Islam and deport Muslims.
The Sunday Telegraph says it can reveal that the government is considering launching a "Care ISA" - which would be exempt from inheritance tax - in an effort to solve the social care crisis.
According to the paper, the Treasury has been reviewing proposals to include the "Care Isa" in the government's forthcoming social care Green Paper.
The paper explains that at present, Isas are taxed at death, so people are encouraged to spend their savings before they die instead of keeping them to fund their care - often needed at the end of their lives.
According to the Mail on Sunday, 10 British ships sunk during the Second World War - which are designated as war graves - have been plundered for scrap metal by Chinese pirates.
It says vessels that provide the final resting place for more than a thousand sailors have been smashed to pieces and looted by salvagers off the Malaysian and Indonesian coasts.
Finally, the Sunday Mirror reports that Lucy Clark - football's only transgender referee - will take to the pitch on Sunday afternoon for the first time under her new identity.
Ms Clark - a cab driver from Surrey - is pictured in her referee kit.
She tells the paper: "I can appreciate people will be a bit shocked when I run on to the pitch. But I'm the same person. I will just look a bit different".