diff --git a/src/release/common.py b/src/release/common.py
index 1312e3c..316879e 100644
--- a/src/release/common.py
+++ b/src/release/common.py
@@ -12,7 +12,7 @@ dataPath = os.path.join(rootPath, './release/')
 metadataFile = os.path.join(rootPath, './assets/metadata.json')
 
 
-def loadData(jsonName: str) -> dict:
+def loadData(jsonName: str) -> dict:  # load book data from json file
     content = json.loads(open(
         os.path.join(dataPath, '%s.json' % jsonName)
     ).read())
@@ -23,5 +23,11 @@ def loadData(jsonName: str) -> dict:
     }
 
 
-if __name__ == '__main__':
-    print(loadData(sys.argv[1]))
+def saveFile(fileName: str, content: str) -> None:  # save into file
+    with open(fileName, 'w') as fileObj:
+        fileObj.write(content)
+
+
+def createFolder(folderName: str) -> None:  # create folder
+    if not os.path.exists(folderName):
+        os.mkdir(folderName)
diff --git a/src/release/gitbook.py b/src/release/gitbook.py
new file mode 100644
index 0000000..f774d58
--- /dev/null
+++ b/src/release/gitbook.py
@@ -0,0 +1,56 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import os
+import re
+from common import loadData
+from common import saveFile
+from common import createFolder
+
+workDir = './temp/'
+contentDir = os.path.join(workDir, './content/')
+
+
+def initFolder() -> None:
+    createFolder(workDir)
+    createFolder(contentDir)
+
+
+def loadChapter(caption: str, content: list) -> str:
+    chapterNum = re.search(r'^第(\d+)章', caption)[1]
+    chapterNum = '0' * (3 - len(chapterNum)) + chapterNum  # add `0` prefix
+    fileName = 'chapter-%s.md' % chapterNum
+    saveFile(
+        os.path.join(workDir, './content/', fileName),
+        '# %s\n\n%s\n' % (caption, '\n\n'.join(content))
+    )
+    return fileName
+
+
+def loadChapters(chapters: dict) -> dict:
+    catalog = {}
+    for (title, chapter) in chapters.items():
+        catalog[title] = loadChapter(title, chapter)
+    return catalog
+
+
+def loadCover(metadata: dict) -> None:
+    cover = '---\ndescription: 作者：%s\n---\n\n# %s\n\n' % (metadata['author'], metadata['name'])
+    cover += '<figure><img src="assets/cover.jpg" alt=""><figcaption></figcaption></figure>\n\n'
+    cover += '\n>\n'.join(['> %s' % x for x in metadata['desc']])
+    saveFile(os.path.join(workDir, 'README.md'), cover)
+
+
+def loadSummary(catalog: dict) -> None:
+    summary = '# XXRS\n\n'
+    summary += '* [栩栩若生](README.md)\n\n'
+    summary += '## 内容 <a href="#content" id="content"></a>\n\n'
+    for (title, mdFile) in catalog.items():
+        summary += '* [%s](content/%s)\n' % (title, mdFile)
+    saveFile(os.path.join(workDir, 'SUMMARY.md'), summary)
+
+
+initFolder()
+# c = loadChapters(loadData('rc-4')['content'])
+# loadSummary(c)
+loadCover(loadData('rc-4')['metadata'])