Fake news! Not a single MAGA-approved book will ever lead them to that kind of information. There's NO way we could have ever had a president that couldn't walk, wheelchairs and walkers weren't invented until after the Internet (because nothing existed before the Internet).
The thing is, the conservative movement hates FDR more than any president except maybe Obama and Biden. There is a wealth of conservative thinktank bullshit out there claiming that FDR made everything worse, and everything everywhere would have gone better if only he'd not been elected.