diff --git a/cmd/manage/events.go b/cmd/manage/events.go
new file mode 100644
index 0000000..f8eea27
--- /dev/null
+++ b/cmd/manage/events.go
@@ -0,0 +1,89 @@
+package main
+
+import (
+	"git.yetaga.in/alazyreader/library/book"
+	"github.com/gdamore/tcell"
+)
+
+// save change to book
+type EventBookUpdate struct {
+	tcell.EventTime
+	book *book.Book
+}
+
+func NewEventBookUpdate(b *book.Book) *EventBookUpdate {
+	e := &EventBookUpdate{book: b}
+	e.SetEventNow()
+	return e
+}
+
+func (e *EventBookUpdate) Book() *book.Book {
+	return e.book
+}
+
+// open new book in display
+type EventLoadBook struct {
+	tcell.EventTime
+	ID int
+}
+
+func NewEventLoadBook(id int) *EventLoadBook {
+	e := &EventLoadBook{ID: id}
+	e.SetEventNow()
+	return e
+}
+
+// open new book in display
+type EventEnterBook struct {
+	tcell.EventTime
+}
+
+func NewEventEnterBook() *EventEnterBook {
+	e := &EventEnterBook{}
+	e.SetEventNow()
+	return e
+}
+
+// switch back to menu control
+type EventExitBook struct {
+	tcell.EventTime
+}
+
+func NewEventExitBook() *EventExitBook {
+	e := &EventExitBook{}
+	e.SetEventNow()
+	return e
+}
+
+// open import window
+type EventOpenImport struct {
+	tcell.EventTime
+}
+
+func NewEventOpenImport() *EventOpenImport {
+	e := &EventOpenImport{}
+	e.SetEventNow()
+	return e
+}
+
+// close import window
+type EventCloseImport struct {
+	tcell.EventTime
+}
+
+func NewEventCloseImport() *EventCloseImport {
+	e := &EventCloseImport{}
+	e.SetEventNow()
+	return e
+}
+
+// quit
+type EventQuit struct {
+	tcell.EventTime
+}
+
+func NewEventQuit() *EventQuit {
+	e := &EventQuit{}
+	e.SetEventNow()
+	return e
+}
diff --git a/cmd/manage/main.go b/cmd/manage/main.go
index 5d9d5fe..2b4b624 100644
--- a/cmd/manage/main.go
+++ b/cmd/manage/main.go
@@ -46,37 +46,13 @@ func (s *State) Set(key string, value interface{}) {
 	s.stateMap[key] = value
 }
 
+// UI states
 const (
 	IN_MENU = iota
 	IN_BOOK
+	IN_IMPORT
 )
 
-type EventBookUpdate struct {
-	tcell.EventTime
-	book *book.Book
-}
-
-func NewEventBookUpdate(b *book.Book) *EventBookUpdate {
-	e := &EventBookUpdate{book: b}
-	e.SetEventNow()
-	return e
-}
-
-func (e *EventBookUpdate) Book() *book.Book {
-	return e.book
-}
-
-type EventLoadBook struct {
-	tcell.EventTime
-	ID int
-}
-
-func NewEventLoadBook(id int) *EventLoadBook {
-	e := &EventLoadBook{ID: id}
-	e.SetEventNow()
-	return e
-}
-
 func main() {
 	var c config.Config
 	err := envconfig.Process("library", &c)
@@ -131,6 +107,7 @@ func main() {
 		}
 	}()
 
+	// book list and options menu (left column)
 	l := ui.NewList(Titles(state.Get("library").([]book.Book)), 0)
 	menu := ui.NewBox(
 		"library",
@@ -145,6 +122,8 @@ func main() {
 	book := ui.NewBookDetails(&book.Book{
 		Title: "test title",
 	})
+
+	// book display (right column)
 	activeBook := ui.NewBox(
 		"book",
 		nil,
@@ -156,6 +135,10 @@ func main() {
 		false,
 	)
 
+	// pop-up
+	popup := ui.NewBox("import", nil, nil, ui.StyleActive, false)
+	popup.SetVisible(false)
+
 	container := ui.NewContainer(
 		ui.Contents{
 			{Container: menu, Offsets: ui.Offsets{Percent: 1}},
@@ -193,42 +176,62 @@ func main() {
 					l.SetSelected(l.Selected() + 1)
 					screen.PostEvent(NewEventLoadBook(l.SelectedID()))
 				}
-				if v.Rune() == 'q' {
-					screen.Fini()
-					fmt.Printf("Thank you for playing Wing Commander!\n\n")
-					return
-				}
 				if v.Key() == tcell.KeyEnter {
-					activeBook.SetStyle(ui.StyleActive)
-					menu.SetStyle(ui.StyleInactive)
-					state.Set("ui_state", IN_BOOK)
+					screen.PostEvent(NewEventEnterBook())
+				}
+				if v.Rune() == 'i' {
+					screen.PostEvent(NewEventOpenImport())
+				}
+				if v.Rune() == 'q' {
+					screen.PostEvent(NewEventQuit())
 				}
 			} else if curr == IN_BOOK {
 				if v.Key() == tcell.KeyEsc {
-					activeBook.SetStyle(ui.StyleInactive)
-					menu.SetStyle(ui.StyleActive)
-					state.Set("ui_state", IN_MENU)
+					screen.PostEvent(NewEventExitBook())
+				}
+			} else if curr == IN_IMPORT {
+				if v.Key() == tcell.KeyEsc {
+					screen.PostEvent(NewEventCloseImport())
 				}
 			}
-			screen.Clear()
-			container.Draw(screen)
 		case *tcell.EventResize: // screen redraw
 			w, h := screen.Size()
 			container.SetSize(0, 0, h, w)
-			screen.Clear()
-			container.Draw(screen)
 		case *EventBookUpdate:
 			// TK
+		case *EventEnterBook:
+			activeBook.SetStyle(ui.StyleActive)
+			menu.SetStyle(ui.StyleInactive)
+			state.Set("ui_state", IN_BOOK)
+		case *EventExitBook:
+			state.Set("ui_state", IN_MENU)
+			activeBook.SetStyle(ui.StyleInactive)
+			menu.SetStyle(ui.StyleActive)
 		case *EventLoadBook:
 			book.SetBook(GetBookByID(v.ID, books))
-			screen.Clear()
-			container.Draw(screen)
+		case *EventOpenImport:
+			state.Set("ui_state", IN_IMPORT)
+			menu.SetStyle(ui.StyleInactive)
+			popup.SetVisible(true)
+			popup.SetSize(6, 3, 10, 80)
+		case *EventCloseImport:
+			state.Set("ui_state", IN_MENU)
+			menu.SetStyle(ui.StyleActive)
+			popup.SetVisible(false)
+		case *EventQuit:
+			screen.Fini()
+			fmt.Printf("Thank you for playing Wing Commander!\n\n")
+			return
 		case *tcell.EventInterrupt:
 		case *tcell.EventMouse:
 		case *tcell.EventTime:
 		default:
 		}
-		screen.Show() // repaint
+		// repaint
+		screen.Clear()
+		container.Draw(screen)
+		popup.Draw(screen)
+		screen.Show()
 	}
 }