diff --git a/Rakefile b/Rakefile
index 7cabb2b..07b7219 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,102 +1,3 @@
-require 'fileutils'
-require 'rake/clean'
-require 'yaml'
-
-BOOK = "book"
-BOOK_PDF = BOOK+".pdf"
-BOOK_EPUB = BOOK+".epub"
-CATALOG_FILE = "catalog.yml"
-CONFIG_FILE = "config.yml"
-WEBROOT = "webroot"
-COVER = "titlepage.tex"
-
-def build(mode, chapter)
-  sh "review-compile --target=#{mode} --footnotetext --stylesheet=style.css #{chapter} > tmp"
-  mode_ext = {"html" => "html", "latex" => "tex",
-              "idgxml" => "xml"}
-  FileUtils.mv "tmp", chapter.gsub(/re\z/, mode_ext[mode])
+Dir.glob('lib/tasks/*.rake').sort.each do |file|
+  load(file)
 end
-
-def build_all(mode)
-  sh "review-compile --target=#{mode} --footnotetext --stylesheet=style.css"
-end
-
-def convert_summary
-  catalog = Hash.new { |h, k| h[k] = [] }
-  catalog['PREDEF'] = ['README.re']
-  File.read("SUMMARY.md").scan(/\((.*.md)/).flatten.each do |file|
-    case file
-    when /appendix/
-      catalog['APPENDIX'] << file.ext('.re')
-    when /postdef/
-      catalog['POSTDEF'] << file.ext('.re')
-    else
-      catalog['CHAPS'] << file.ext('.re')
-    end
-  end
-  File.write(CATALOG_FILE, YAML.dump(catalog))
-end
-
-task :default => :pdf
-
-desc "build html (Usage: rake build re=target.re)"
-task :html do
-  if ENV['re'].nil?
-    puts "Usage: rake build re=target.re"
-    exit
-  end
-  build("html", ENV['re'])
-end
-
-desc "build all html"
-task :html_all do
-  build_all("html")
-end
-
-desc 'preproc all'
-task :preproc do
-  Dir.glob("*.re").each do |file|
-    sh "review-preproc --replace #{file}"
-  end
-end
-
-desc 'generate PDF and EPUB file'
-task :all => [:pdf, :epub]
-
-desc 'generate PDF file'
-task :pdf => BOOK_PDF
-
-desc 'generate stagic HTML file for web'
-task :web => WEBROOT
-
-desc 'generate EPUB file'
-task :epub => BOOK_EPUB
-
-SRC = FileList['*.md'] + %w(SUMMARY.md)
-OBJ = SRC.ext('re') + [CATALOG_FILE]
-INPUT = OBJ + [CONFIG_FILE, COVER]
-
-rule '.re' => '.md' do |t|
-  sh "bundle exec md2review --render-link-in-footnote #{t.source} > #{t.name}"
-end
-
-file CATALOG_FILE => 'SUMMARY.md' do |t|
-  convert_summary
-end
-
-file BOOK_PDF => INPUT do
-  FileUtils.rm_rf [BOOK_PDF, BOOK, BOOK+"-pdf"]
-  sh "review-pdfmaker #{CONFIG_FILE}"
-end
-
-file BOOK_EPUB => INPUT do
-  FileUtils.rm_rf [BOOK_EPUB, BOOK, BOOK+"-epub"]
-  sh "review-epubmaker #{CONFIG_FILE}"
-end
-
-file WEBROOT => INPUT do
-  FileUtils.rm_rf [WEBROOT]
-  sh "review-webmaker #{CONFIG_FILE}"
-end
-
-CLEAN.include([OBJ, BOOK, BOOK_PDF, BOOK_EPUB, BOOK+"-pdf", BOOK+"-epub", WEBROOT])
diff --git a/lib/tasks/review.rake b/lib/tasks/review.rake
new file mode 100644
index 0000000..5d48f40
--- /dev/null
+++ b/lib/tasks/review.rake
@@ -0,0 +1,152 @@
+# Copyright (c) 2006-2021 Minero Aoki, Kenshi Muto, Masayoshi Takahashi, Masanori Kado.
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+require 'fileutils'
+require 'rake/clean'
+
+BOOK = ENV['REVIEW_BOOK'] || 'book'
+BOOK_PDF = BOOK + '.pdf'
+BOOK_EPUB = BOOK + '.epub'
+CONFIG_FILE = ENV['REVIEW_CONFIG_FILE'] || 'config.yml'
+CATALOG_FILE = ENV['REVIEW_CATALOG_FILE'] || 'catalog.yml'
+WEBROOT = ENV['REVIEW_WEBROOT'] || 'webroot'
+TEXTROOT = BOOK + '-text'
+TOPROOT = BOOK + '-text'
+IDGXMLROOT = BOOK + '-idgxml'
+PDF_OPTIONS = ENV['REVIEW_PDF_OPTIONS'] || ''
+EPUB_OPTIONS = ENV['REVIEW_EPUB_OPTIONS'] || ''
+WEB_OPTIONS = ENV['REVIEW_WEB_OPTIONS'] || ''
+IDGXML_OPTIONS = ENV['REVIEW_IDGXML_OPTIONS'] || ''
+TEXT_OPTIONS = ENV['REVIEW_TEXT_OPTIONS'] || ''
+
+REVIEW_VSCLI = ENV['REVIEW_VSCLI'] || 'vivliostyle'
+REVIEW_VSCLI_USESANDBOX = ENV['REVIEW_VSCLI_USESANDBOX'] ? '' : '--no-sandbox'
+REVIEW_VSCLI_PDF = ENV['REVIEW_VSCLI_PDF'] || BOOK_PDF
+REVIEW_VSCLI_OPTIONS = ENV['REVIEW_VSCLI_OPTIONS'] || ''
+
+def build(mode, chapter)
+  sh("review-compile --target=#{mode} --footnotetext --stylesheet=style.css #{chapter} > tmp")
+  mode_ext = { 'html' => 'html', 'latex' => 'tex', 'idgxml' => 'xml', 'top' => 'txt', 'plaintext' => 'txt' }
+  FileUtils.mv('tmp', chapter.gsub(/re\z/, mode_ext[mode]))
+end
+
+def build_all(mode)
+  sh("review-compile --target=#{mode} --footnotetext --stylesheet=style.css")
+end
+
+task default: :html_all
+
+desc 'build html (Usage: rake build re=target.re)'
+task :html do
+  if ENV['re'].nil?
+    puts 'Usage: rake build re=target.re'
+    exit
+  end
+  build('html', ENV['re'])
+end
+
+desc 'build all html'
+task :html_all do
+  build_all('html')
+end
+
+desc 'preproc all'
+task :preproc do
+  Dir.glob('*.re').each do |file|
+    sh "review-preproc --replace #{file}"
+  end
+end
+
+desc 'generate PDF and EPUB file'
+task all: %i[pdf epub]
+
+desc 'generate PDF file'
+task pdf: BOOK_PDF
+
+desc 'generate static HTML file for web'
+task web: WEBROOT
+
+desc 'generate text file (without decoration)'
+task plaintext: TEXTROOT do
+  sh "review-textmaker #{TEXT_OPTIONS} -n #{CONFIG_FILE}"
+end
+
+desc 'generate (decorated) text file'
+task text: TOPROOT do
+  sh "review-textmaker #{TEXT_OPTIONS} #{CONFIG_FILE}"
+end
+
+desc 'generate IDGXML file'
+task idgxml: IDGXMLROOT do
+  sh "review-idgxmlmaker #{IDGXML_OPTIONS} #{CONFIG_FILE}"
+end
+
+desc 'generate EPUB file'
+task epub: BOOK_EPUB
+
+IMAGES = FileList['images/**/*']
+OTHERS = ENV['REVIEW_DEPS'] || []
+MDS = FileList['*.md']
+RES = MDS.ext('re')
+SRC = RES + [CONFIG_FILE, CATALOG_FILE] + IMAGES + FileList[OTHERS]
+SRC_EPUB = FileList['*.css']
+SRC_PDF = FileList['layouts/*.erb', 'sty/**/*.sty']
+
+rule '.re' => '.md' do |t|
+  sh "md2review --render-link-in-footnote #{t.source} > #{t.name}"
+end
+
+file BOOK_PDF => SRC + SRC_PDF do
+  FileUtils.rm_rf([BOOK_PDF, BOOK, BOOK + '-pdf'])
+  sh "review-pdfmaker #{PDF_OPTIONS} #{CONFIG_FILE}"
+end
+
+file BOOK_EPUB => SRC + SRC_EPUB do
+  FileUtils.rm_rf([BOOK_EPUB, BOOK, BOOK + '-epub'])
+  sh "review-epubmaker #{EPUB_OPTIONS} #{CONFIG_FILE}"
+end
+
+file WEBROOT => SRC do
+  FileUtils.rm_rf([WEBROOT])
+  sh "review-webmaker #{WEB_OPTIONS} #{CONFIG_FILE}"
+end
+
+file TEXTROOT => SRC do
+  FileUtils.rm_rf([TEXTROOT])
+end
+
+file IDGXMLROOT => SRC do
+  FileUtils.rm_rf([IDGXMLROOT])
+end
+
+desc 'preview with vivliostyle'
+task 'vivliostyle:preview': BOOK_EPUB do
+  sh "#{REVIEW_VSCLI} preview #{REVIEW_VSCLI_USESANDBOX} #{REVIEW_VSCLI_OPTIONS} #{BOOK_EPUB}"
+end
+
+desc 'build with vivliostyle'
+task 'vivliostyle:build': BOOK_EPUB do
+  sh "#{REVIEW_VSCLI} build #{REVIEW_VSCLI_USESANDBOX} #{REVIEW_VSCLI_OPTIONS} -o #{REVIEW_VSCLI_PDF} #{BOOK_EPUB}"
+end
+
+desc 'build with vivliostyle'
+task vivliostyle: 'vivliostyle:build'
+
+CLEAN.include([BOOK, BOOK_PDF, BOOK_EPUB, BOOK + '-pdf', BOOK + '-epub', WEBROOT, 'images/_review_math', 'images/_review_math_text', TEXTROOT, IDGXMLROOT, RES])