diff --git a/public/js/reader.js b/public/js/reader.js
index 012ba6f..ec8ab32 100644
--- a/public/js/reader.js
+++ b/public/js/reader.js
@@ -57,12 +57,12 @@ $('#page-select').change(function(){
 	jumpTo(parseInt($('#page-select').val()));
 });
 function showControl(idx) {
-	$('#page-select').val(idx + 1);
+	$('#page-select').val(idx);
 	UIkit.modal($('#modal-sections')).show();
 }
 function jumpTo(page) {
 	var ary = window.location.pathname.split('/');
-	ary[ary.length - 1] = page - 1;
+	ary[ary.length - 1] = page;
 	ary.shift(); // remove leading `/`
 	ary.unshift(window.location.origin);
 	window.location.replace(ary.join('/'));
diff --git a/src/library.cr b/src/library.cr
index 65ea215..89fa9bc 100644
--- a/src/library.cr
+++ b/src/library.cr
@@ -32,7 +32,7 @@ class Entry
 				MIME.from_filename? e.filename
 			}
 			.size
-		@cover_url = "/api/page/#{@book_title}/#{title}/0"
+		@cover_url = "/api/page/#{@book_title}/#{title}/1"
 	end
 	def read_page(page_num)
 		Zip::File.open @zip_path do |file|
@@ -42,7 +42,7 @@ class Entry
 					MIME.from_filename? e.filename
 				}
 				.sort { |a, b| a.filename <=> b.filename }
-				.[page_num]
+				.[page_num - 1]
 			page.open do |io|
 				slice = Bytes.new page.uncompressed_size
 				bytes_read = io.read_fully? slice
diff --git a/src/mango.cr b/src/mango.cr
index b3a93e6..72e501c 100644
--- a/src/mango.cr
+++ b/src/mango.cr
@@ -163,11 +163,11 @@ get "/reader/:title/:entry" do |env|
 
 		# load progress
 		username = get_username env
-		page = (title.load_progress username, entry.title) - 1
+		page = title.load_progress username, entry.title
 		# we go back 2 * `IMGS_PER_PAGE` pages. the infinite scroll library
 		# perloads a few pages in advance, and the user might not have actually
 		# read them
-		page = [page - 2 * IMGS_PER_PAGE, 0].max
+		page = [page - 2 * IMGS_PER_PAGE, 1].max
 
 		env.redirect "/reader/#{title.title}/#{entry.title}/#{page}"
 	rescue
@@ -180,19 +180,19 @@ get "/reader/:title/:entry/:page" do |env|
 		title = (library.get_title env.params.url["title"]).not_nil!
 		entry = (title.get_entry env.params.url["entry"]).not_nil!
 		page = env.params.url["page"].to_i
-		raise "" if page >= entry.pages
+		raise "" if page > entry.pages
 
 		# save progress
 		username = get_username env
-		title.save_progress username, entry.title, page + 1
+		title.save_progress username, entry.title, page
 
-		pages = (page...[entry.pages, page + IMGS_PER_PAGE].min)
+		pages = (page...[entry.pages + 1, page + IMGS_PER_PAGE].min)
 		urls = pages.map { |idx|
 			"/api/page/#{title.title}/#{entry.title}/#{idx}" }
 		reader_urls = pages.map { |idx|
 			"/reader/#{title.title}/#{entry.title}/#{idx}" }
 		next_page = page + IMGS_PER_PAGE
-		next_url = next_page >= entry.pages ? nil :
+		next_url = next_page > entry.pages ? nil :
 			"/reader/#{title.title}/#{entry.title}/#{next_page}"
 		exit_url = "/book/#{title.title}"