diff --git a/doc/.gitignore b/doc/.gitignore
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index 00000000..9f743a65
--- /dev/null
+++ b/doc/.gitignore
@@ -0,0 +1,2 @@
+/_book
+/node_modules
diff --git a/doc/README.md b/doc/README.md
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--- /dev/null
+++ b/doc/README.md
@@ -0,0 +1,3 @@
+# GORM
+
+This is GORM
diff --git a/doc/SUMMARY.md b/doc/SUMMARY.md
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+++ b/doc/SUMMARY.md
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+# Summary
+
+* [GORM](README.md)
+* [Database](database/database.md)
+  * [Connecting to a Database](database/connect-database.md)
+  * [Migration](database/migration.md)
+  * [Schema]()
+* [Models]()
+  * [Model Defination]()
+  * [Naming Conventions & Overriding]()
+  * [Associations]()
+    * [Belongs To]()
+    * [Has One]()
+    * [Has Many]()
+    * [Many To Many]()
+    * [Polymorphism]()
+    * [Association Mode]()
+* [CRUD: Reading and Writing Data]()
+  * [Create]()
+  * [Query]()
+    * [Preloading (Eager Loading)]()
+  * [Update]()
+  * [Delete / Soft Delete]()
+  * [Callbacks]()
+* [Advanced Usage]()
+  * [Error Handling]()
+  * [Transactions]()
+  * [Raw SQL & SQL Builder]()
+  * [Composite Primary Key]()
+  * [Overriding Logger]()
+* [Development]()
+  * [Write Plugins]()
diff --git a/doc/book.json b/doc/book.json
new file mode 100644
index 00000000..bcf750b9
--- /dev/null
+++ b/doc/book.json
@@ -0,0 +1,20 @@
+{
+  "title": "GORM Guide",
+  "plugins": [
+    "prism", "-highlight", "collapsible-menu", "toc",
+    "github", "anchors", "edit-link"
+  ],
+  "pluginsConfig": {
+    "toc": {
+      "addClass": true,
+      "className": "toc"
+    },
+    "github": {
+      "url": "https://github.com/jinzhu/gorm"
+    },
+    "edit-link": {
+      "base": "https://github.com/jinzhu/gorm/edit/gh-pages",
+      "label": "Edit This Page"
+    }
+  }
+}
diff --git a/doc/database/connect-database.md b/doc/database/connect-database.md
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+++ b/doc/database/connect-database.md
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+### Connecting To A Database
+
+```go
+import (
+    "github.com/jinzhu/gorm"
+    _ "github.com/lib/pq"
+    _ "github.com/go-sql-driver/mysql"
+    _ "github.com/mattn/go-sqlite3"
+)
+
+func init() {
+  db, err := gorm.Open("postgres", "user=gorm dbname=gorm sslmode=disable")
+  // db, err := gorm.Open("mysql", "user:password@/dbname?charset=utf8&parseTime=True&loc=Local")
+  // db, err := gorm.Open("sqlite3", "/tmp/gorm.db")
+
+  // Use existing database connection
+  dbSql, err := sql.Open("postgres", "user=gorm dbname=gorm sslmode=disable")
+  db, err := gorm.Open("postgres", dbSql)
+}
+```
+
+```go
+// Get database connection handle [*sql.DB](http://golang.org/pkg/database/sql/#DB)
+db.DB()
+
+// Then you could invoke `*sql.DB`'s functions with it
+db.DB().Ping()
+db.DB().SetMaxIdleConns(10)
+db.DB().SetMaxOpenConns(100)
+
+// Disable table name's pluralization
+db.SingularTable(true)
+```
diff --git a/doc/database/database.md b/doc/database/database.md
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--- /dev/null
+++ b/doc/database/database.md
@@ -0,0 +1,4 @@
+## Database
+
+<!-- toc -->
+
diff --git a/doc/database/migration.md b/doc/database/migration.md
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+++ b/doc/database/migration.md
@@ -0,0 +1,59 @@
+## Migration
+
+<!-- toc -->
+
+### Auto Migration
+
+Automatically migrate your schema, to keep your schema update to date
+
+**WARNING** AutoMigrate will ONLY create tables, columns and indexes if doesn't exist,
+WON'T change existing column's type or delete unused columns to protect your data
+
+```go
+db.AutoMigrate(&User{})
+
+db.AutoMigrate(&User{}, &Product{}, &Order{})
+
+// Add table suffix when create tables
+db.Set("gorm:table_options", "ENGINE=InnoDB").AutoMigrate(&User{})
+```
+
+### Has Table
+
+```go
+// Check if model `User`'s table has been created or not
+db.HasTable(&User{})
+
+// Check table `users` exists or not
+db.HasTable("users")
+```
+
+### Create Table
+
+```go
+db.CreateTable(&User{})
+
+db.Set("gorm:table_options", "ENGINE=InnoDB").CreateTable(&User{})
+// will append "ENGINE=InnoDB" to the SQL statement when creating table `users`
+```
+
+### Drop table
+
+```go
+db.DropTable(&User{})
+```
+
+### ModifyColumn
+
+Change column's type
+
+```go
+// change column description's data type to `text` for model `User`'s table
+db.Model(&User{}).ModifyColumn("description", "text")
+```
+
+### DropColumn
+
+```go
+db.Model(&User{}).DropColumn("description")
+```