cairo-book · enitrat · Jun 7, 2024 · Jun 6, 2024 · Jun 6, 2024
diff --git a/src/SUMMARY.md b/src/SUMMARY.md
@@ -97,7  97,7 @@
   - [A - Keywords](appendix-01-keywords.md)
   - [B - Operators and Symbols](appendix-02-operators-and-symbols.md)
   - [C - Derivable Traits](appendix-03-derivable-traits.md)
-  - [D - Common Types & Traits and the Cairo Prelude](appendix-04-common-types-and-traits-and-cairo-prelude.md)
   - [D - The Cairo Prelude](appendix-04-cairo-prelude.md)
   - [E - Common Error Messages](appendix-05-common-error-messages.md)
   - [F - Useful Development Tools](appendix-06-useful-development-tools.md)
   - [G - Installing Cairo binaries](appendix-07-cairo-binaries.md)

diff --git a/src/appendix-04-cairo-prelude.md b/src/appendix-04-cairo-prelude.md
@@ -0,0  1,33 @@
 # Appendix D - The Cairo Prelude
 
 ## Prelude
 
 The Cairo prelude is a collection of commonly used modules, functions, data
 types, and traits that are automatically brought into scope of every module in a
 Cairo crate without needing explicit import statements. Cairo's prelude provides
 the basic building blocks developers need to start Cairo programs and writing
 smart contracts.
 
 The core library prelude is defined in the _[lib.cairo](https://github.com/starkware-libs/cairo/blob/main/corelib/src/lib.cairo)_
 file of the corelib crate and contains Cairo's primitive data types, traits,
 operators, and utility functions. This includes:
 
 - Data types: integers, bools, arrays, dicts, etc.
 - Traits: behaviors for arithmetic, comparison, and serialization operations
 - Operators: arithmetic, logical, bitwise
 - Utility functions - helpers for arrays, maps, boxing, etc.
 
 The core library prelude delivers the fundamental programming
 constructs and operations needed for basic Cairo programs, without requiring the
 explicit import of elements. Since the core library prelude is automatically
 imported, its contents are available for use in any Cairo crate without explicit
 imports. This prevents repetition and provides a better devX. This is what
 allows you to use `ArrayTrait::append()` or the `Default` trait without bringing
 them explicitly into scope.
 
 You can choose which prelude to use. For example, adding `edition = "2023_11"` in the _Scarb.toml_ configuration file will load the prelude from November 2023. Note that when you create a new project using `scarb new` command, the _Scarb.toml_ file will automatically include `edition = "2023_11"`.
 
 The compiler currently exposes 2 different versions of the prelude:
 
 - A general version, with a lot of traits that are made available, corresponding to `edition = "2023_01"`.
 - A restricted version, including the most essential traits needed for general Cairo programming, corresponding to `edition = 2023_11`.
diff --git a/src/appendix-04-common-types-and-traits-and-cairo-prelude.md b/src/appendix-04-common-types-and-traits-and-cairo-prelude.md
diff --git a/src/ch01-02-hello-world.md b/src/ch01-02-hello-world.md
@@ -82,7  82,7 @@ This file is in the [TOML][toml doc] (Tom’s Obvious, Minimal Language) format,
 
 The first line, `[package]`, is a section heading that indicates that the following statements are configuring a package. As we add more information to this file, we’ll add other sections.
 
-The next three lines set the configuration information Scarb needs to compile your program: the name of the package and the version of Scarb to use, and the edition of the prelude to use. The prelude is the collection of the most commonly used items that are automatically imported into every Cairo program. You can learn more about the prelude in [Appendix D][types, traits, and prelude].
 The next three lines set the configuration information Scarb needs to compile your program: the name of the package and the version of Scarb to use, and the edition of the prelude to use. The prelude is the collection of the most commonly used items that are automatically imported into every Cairo program. You can learn more about the prelude in [Appendix D][prelude].
 
 The last line, `[dependencies]`, is the start of a section for you to list any of your project’s dependencies. In Cairo, packages of code are referred to as crates. We won’t need any other crates for this project.
 
@@ -123,7  123,7 @@ If you started a project that doesn’t use Scarb, you can convert it to a proje
 <span class="caption"> A sample Scarb project structure</span>
 
 [toml doc]: https://toml.io/
-[types, traits, and prelude]: ./appendix-04-common-types-and-traits-and-cairo-prelude.md
 [prelude]: ./appendix-04-cairo-prelude.md
 [starknet package]: https://docs.swmansion.com/scarb/docs/extensions/starknet/starknet-package.html
 
 ## Building a Scarb Project
@@ -200,7  200,7 @@ Fourth, we end the line with a semicolon (`;`), which indicates that this
 expression is over and the next one is ready to begin. Most lines of Cairo code
 end with a semicolon.
 
-[devtools]: ./appendix-04-useful-development-tools.md
 [devtools]: ./appendix-06-useful-development-tools.md
 [macros]: ./ch11-05-macros.md
 
 {{#quiz ../quizzes/ch01-02-hello-world.toml}}