The Rustonomicon
The rustnomicon is a very good resource. It's less of "the unsafe book" and more "the advanced book", covering lower-level details and advanced concepts that aren't touch on by the book. One gripe I have is that it kind of pushes the idea that unsafe is bad and evil, which is not true at all:> The Dark Arts of Unsafe Rust> THE KNOWLEDGE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF UNLEASHING INDESCRIBABLE HORRORS THAT SHATTER YOUR PSYCHE AND SET YOUR MIND ADRIFT IN THE UNKNOWABLY INFINITE COSMOS.I know it's a joke, and I laughed when I first read it. Unsafe is dangerous and requires care, but unsafe == evil is definitely not true. Jon Gjengset said it well in "Demystifying Unsafe Code" [0]:> One thing I keep observing about the Rust community is how we're all like allergic to unsafe code or we think that unsafe code is is totally fine and not nothing to worry about, and I wanted to take a little bit of time to talk about what unsafe is because I think a lot of where the communities lack of alignment on this particular topic comes from a fact that unsafe is a bit of a mystery to many of usLearning about unsafe is useful, and at time necessary, it's not inherently evil, nor should it be used too freely.[0]: https://www.youtube.com/watch?v=QAz-maaH0KM