[yannickt]

I don't know OP's country of residence, but I believe Vanguard mutual funds are not available in the US - they're not available in Canada at least. Even if one has access to the Vanguard retirement funds, it's still useful to understand why a portfolio works over the long term (or not). This can be particularly useful when the markets plunge, as they did very recently.

I've read both Four Pillars and Random Walk; I refer back to the former much more often than the latter. But both are great books.