diff --git a/book/src/SUMMARY.md b/book/src/SUMMARY.md
index 9a41e5d1..7ac50999 100644
--- a/book/src/SUMMARY.md
+++ b/book/src/SUMMARY.md
@@ -13,3 +13,10 @@
 
 - [Design Documents](design_docs.md)
     - [Pipelinable Block Lookup](./designs/0001-pipelinable-block-lookup.md)
+
+# Applications
+- [Applications](applications.md)
+    - [zebrad](./applications/zebrad.md)
+        - [Enviroment variables](./applications/zebrad/enviroment-variables.md)
+    - [utils](./applications/utils.md)
+        - [zebra-checkpoints](./applications/utils/zebra-checkpoints.md)
diff --git a/book/src/applications.md b/book/src/applications.md
new file mode 100644
index 00000000..a217ca63
--- /dev/null
+++ b/book/src/applications.md
@@ -0,0 +1,4 @@
+# Applications
+
+- [zebrad](applications/zebrad.md)
+- [zebra-checkpoints](applications/utils/zebra-checkpoints.md)
diff --git a/book/src/applications/utils.md b/book/src/applications/utils.md
new file mode 100644
index 00000000..06588bfb
--- /dev/null
+++ b/book/src/applications/utils.md
@@ -0,0 +1 @@
+# utils
diff --git a/book/src/applications/utils/enviroment-variables.md b/book/src/applications/utils/enviroment-variables.md
new file mode 100644
index 00000000..4dbd4504
--- /dev/null
+++ b/book/src/applications/utils/enviroment-variables.md
@@ -0,0 +1 @@
+# zebra-checkpoints
diff --git a/book/src/applications/utils/zebra-checkpoints.md b/book/src/applications/utils/zebra-checkpoints.md
new file mode 100644
index 00000000..4dbd4504
--- /dev/null
+++ b/book/src/applications/utils/zebra-checkpoints.md
@@ -0,0 +1 @@
+# zebra-checkpoints
diff --git a/book/src/applications/zebrad.md b/book/src/applications/zebrad.md
new file mode 100644
index 00000000..8a6fad7a
--- /dev/null
+++ b/book/src/applications/zebrad.md
@@ -0,0 +1,4 @@
+# zebrad
+
+- [Enviroment variables](./zebrad/enviroment-variables.md)
+
diff --git a/book/src/applications/zebrad/enviroment-variables.md b/book/src/applications/zebrad/enviroment-variables.md
new file mode 100644
index 00000000..9306cfb5
--- /dev/null
+++ b/book/src/applications/zebrad/enviroment-variables.md
@@ -0,0 +1,29 @@
+# Zebrad enviroment variables
+
+All zebrad subcommands support the following enviroment variables:
+- `ZEBRAD_CACHE_DIR`: The directory to store zebra data just as state, blocks, wallet, etc.
+- `ZEBRAD_LOG`: Manipulate the log level. Regex is supported.
+
+## Examples:
+
+Use a custom data directory:
+```
+export ZEBRAD_CACHE_DIR="/my/zebra_data_dir"
+zebrad start
+```
+
+Output all info messages:
+
+```
+export ZEBRAD_LOG="info"
+zebrad start
+```
+
+Output block_verify with trace level and above every 1000 blocks:
+
+```
+export ZEBRAD_LOG="[block_verify{height=Some\(BlockHeight\(.*000\)\)}]=trace"
+zebrad start
+```
+
+Note: Log options are processed in this order: verbose flag, command stdout, enviroment variable, config file.
\ No newline at end of file
diff --git a/zebrad/src/commands.rs b/zebrad/src/commands.rs
index e0165537..3509566d 100644
--- a/zebrad/src/commands.rs
+++ b/zebrad/src/commands.rs
@@ -24,33 +24,6 @@ use std::path::PathBuf;
 pub const CONFIG_FILE: &str = "zebrad.toml";
 
 /// Zebrad Subcommands
-///
-/// All subcommands support the following enviroment variables:
-/// - `ZEBRAD_CACHE_DIR`: The directory to store zebra data just as state, blocks, wallet, etc.
-/// - `ZEBRAD_LOG`: Manipulate the log level. Regex is supported.
-/// ## Examples:
-///
-/// Use a custom data directory:
-/// ```
-/// export ZEBRAD_CACHE_DIR="/my/zebra_data_dir"
-/// zebrad start
-/// ```
-///
-/// Output all info messages:
-///
-/// ```
-/// export ZEBRAD_LOG="info"
-/// zebrad start
-/// ```
-///
-/// Output block_verify with trace level and above every 1000 blocks:
-///
-/// ```
-/// export ZEBRAD_LOG="[block_verify{height=Some\(BlockHeight\(.*000\)\)}]=trace"
-/// zebrad start
-/// ```
-///
-/// Note: Log options are processed in this order: verbose flag, command stdout, enviroment variable, config file.
 #[derive(Command, Debug, Options, Runnable)]
 pub enum ZebradCmd {
     /// The `generate` subcommand