The Duke of Sussex, 33, reportedly spent a huge $14,000 on a present for his newest nephew, who was christened at the Chapel Royal in St. James's Palace on Monday.
Reports claim the royal found an incredibly rare first-edition copy of A.A. Milne's Winnie-the-Pooh, dating back to 1926, which he bought from Peter Harrington, a rare book store in London.
A source told The Sun, 'One of Harry’s happiest childhood memories was being read a bedtime story by his mother.
'She loved all the old classics and Harry had the brilliant idea of starting a little library of first editions for Louis, Charlotte and George to enjoy as they get older.'
According to the insider, Harry originally planned on buying a copy of Lewis Carrol’s Through The Looking Glass for Prince Louis, which would have cost a whopping $42,600, but decided Winnie-the-Pooh was more appropriate.
Prince Harry and his new wife Meghan Markle, 36, were among just 30 guests invited to Louis’ christening.