Books and other resources about accident investigation

I’m from Scandinavia and read most of the reports from the Swedish and Danish investigation boards. Could probably request copies of the same kind of information due to public information laws. But to have a public searchable database like this, wow, thats just an amazing resource. Thanks!

Thanks. Another really atrocious investigation is the one on the ferry Estonia, which sank in the Baltic mid 90s. Reading up on how the investigation was held is quite an amazing read.

Both the book by Nancy Leveson and the one recommended by @KPChief seems interesting. Will take a look on both.