3 files changed, 4 insertions, 7 deletions
diff --git a/src/libcore/convert.rs b/src/libcore/convert.rs
index 203be541e49..b24a442131e 100644
--- a/src/libcore/convert.rs
+++ b/src/libcore/convert.rs
@@ -113,9 +113,6 @@ pub const fn identity<T>(x: T) -> T { x }
 /// - Use `Borrow` when the goal is related to writing code that is agnostic to
 ///   the type of borrow and whether it is a reference or value
 ///
-/// See [the book][book] for a more detailed comparison.
-///
-/// [book]: ../../book/first-edition/borrow-and-asref.html
 /// [`Borrow`]: ../../std/borrow/trait.Borrow.html
 ///
 /// **Note: this trait must not fail**. If the conversion can fail, use a
@@ -348,7 +345,7 @@ pub trait Into<T>: Sized {
 /// [`String`]: ../../std/string/struct.String.html
 /// [`Into<U>`]: trait.Into.html
 /// [`from`]: trait.From.html#tymethod.from
-/// [book]: ../../book/first-edition/error-handling.html
+/// [book]: ../../book/ch09-00-error-handling.html
 #[stable(feature = "rust1", since = "1.0.0")]
 pub trait From<T>: Sized {
     /// Performs the conversion.
diff --git a/src/libcore/marker.rs b/src/libcore/marker.rs
index 65752ba0321..a92131ce84f 100644
--- a/src/libcore/marker.rs
+++ b/src/libcore/marker.rs
@@ -78,7 +78,7 @@ impl<T: ?Sized> !Send for *mut T { }
 ///                         // be made into an object
 /// ```
 ///
-/// [trait object]: ../../book/first-edition/trait-objects.html
+/// [trait object]: ../../book/ch17-02-trait-objects.html
 #[stable(feature = "rust1", since = "1.0.0")]
 #[lang = "sized"]
 #[rustc_on_unimplemented(
@@ -518,7 +518,7 @@ macro_rules! impls{
 /// types. We track the Rust type using a phantom type parameter on
 /// the struct `ExternalResource` which wraps a handle.
 ///
-/// [FFI]: ../../book/first-edition/ffi.html
+/// [FFI]: ../../book/ch19-01-unsafe-rust.html#using-extern-functions-to-call-external-code
 ///
 /// ```
 /// # #![allow(dead_code)]
diff --git a/src/libcore/mem.rs b/src/libcore/mem.rs
index 8fcbb73d9ce..810a1f2fb4a 100644
--- a/src/libcore/mem.rs
+++ b/src/libcore/mem.rs
@@ -298,7 +298,7 @@ pub const fn size_of<T>() -> usize {
 /// then `size_of_val` can be used to get the dynamically-known size.
 ///
 /// [slice]: ../../std/primitive.slice.html
-/// [trait object]: ../../book/first-edition/trait-objects.html
+/// [trait object]: ../../book/ch17-02-trait-objects.html
 ///
 /// # Examples
 ///