diff --git a/__init__.py b/__init__.py
index 6115d74..f7075c0 100644
--- a/__init__.py
+++ b/__init__.py
@@ -8,7 +8,7 @@ from .book import Book
 from .types import Type
 from .line import Line, LineContext
 from .splitline import SplitLine
-from .wizard_openline import OpenCashBook, OpenCashBookStart
+from .wizard_openline import OpenCashBook, OpenCashBookStart, OpenCashBookTree
 from .wizard_runreport import RunCbReport, RunCbReportStart
 from .wizard_booking import EnterBookingWizard, EnterBookingStart
 from .configuration import Configuration, UserConfiguration
@@ -36,6 +36,7 @@ def register():
         module='cashbook', type_='report')
     Pool.register(
         OpenCashBook,
+        OpenCashBookTree,
         RunCbReport,
         EnterBookingWizard,
         module='cashbook', type_='wizard')
diff --git a/locale/de.po b/locale/de.po
index ae53653..4d5c973 100644
--- a/locale/de.po
+++ b/locale/de.po
@@ -150,6 +150,10 @@ msgctxt "model:ir.message,text:msg_book_btype_with_lines"
 msgid "The type cannot be deleted on the cash book '%(cbname)s' because it still contains %(numlines)s lines."
 msgstr "Der Typ kann am Kassenbuch '%(cbname)s' nicht gelöscht werden, da es noch %(numlines)s Zeilen enthält."
 
+msgctxt "model:ir.message,text:msg_book_no_type_noopen"
+msgid "The cash book '%(bookname)s' has no type and therefore cannot be opened."
+msgstr "Das Kassenbuch '%(bookname)s' hat keinen Typ und kann daher nicht geöffnet werden."
+
 
 #############
 # res.group #
@@ -306,6 +310,10 @@ msgctxt "model:ir.action,name:act_open_lines"
 msgid "Open Cashbook"
 msgstr "Kassenbuch öffnen"
 
+msgctxt "model:ir.action,name:act_open_tree_lines"
+msgid "Open Cashbook"
+msgstr "Kassenbuch öffnen"
+
 msgctxt "model:ir.action,name:report_cashbook"
 msgid "Cashbook"
 msgstr "Kassenbuch"
@@ -1082,6 +1090,10 @@ msgctxt "model:cashbook.open_lines,name:"
 msgid "Open Cashbook"
 msgstr "Kassenbuch öffnen"
 
+msgctxt "model:cashbook.open_lines_tree,name:"
+msgid "Open Cashbook"
+msgstr "Kassenbuch öffnen"
+
 msgctxt "wizard_button:cashbook.open_lines,askuser,end:"
 msgid "Cancel"
 msgstr "Abbruch"
diff --git a/locale/en.po b/locale/en.po
index aa8ea3d..b97e385 100644
--- a/locale/en.po
+++ b/locale/en.po
@@ -146,6 +146,10 @@ msgctxt "model:ir.message,text:msg_book_btype_with_lines"
 msgid "The type cannot be deleted on the cash book '%(cbname)s' because it still contains %(numlines)s lines."
 msgstr "The type cannot be deleted on the cash book '%(cbname)s' because it still contains %(numlines)s lines."
 
+msgctxt "model:ir.message,text:msg_book_no_type_noopen"
+msgid "The cash book '%(bookname)s' has no type and therefore cannot be opened."
+msgstr "The cash book '%(bookname)s' has no type and therefore cannot be opened."
+
 msgctxt "model:res.group,name:group_cashbook"
 msgid "Cashbook"
 msgstr "Cashbook"
@@ -286,6 +290,10 @@ msgctxt "model:ir.action,name:act_open_lines"
 msgid "Open Cashbook"
 msgstr "Open Cashbook"
 
+msgctxt "model:ir.action,name:act_open_tree_lines"
+msgid "Open Cashbook"
+msgstr "Open Cashbook"
+
 msgctxt "model:ir.action,name:report_cashbook"
 msgid "Cashbook"
 msgstr "Cashbook"
@@ -478,6 +486,18 @@ msgctxt "field:cashbook.book,balance:"
 msgid "Balance"
 msgstr "Balance"
 
+msgctxt "help:cashbook.book,balance:"
+msgid "Balance of bookings to date"
+msgstr "Balance of bookings to date"
+
+msgctxt "field:cashbook.book,balance_all:"
+msgid "Total balance"
+msgstr "Total balance"
+
+msgctxt "help:cashbook.book,balance_all:"
+msgid "Balance of all bookings"
+msgstr "Balance of all bookings"
+
 msgctxt "field:cashbook.book,reconciliations:"
 msgid "Reconciliations"
 msgstr "Reconciliations"
@@ -1010,6 +1030,10 @@ msgctxt "model:cashbook.open_lines,name:"
 msgid "Open Cashbook"
 msgstr "Open Cashbook"
 
+msgctxt "model:cashbook.open_lines_tree,name:"
+msgid "Open Cashbook"
+msgstr "Open Cashbook"
+
 msgctxt "wizard_button:cashbook.open_lines,askuser,end:"
 msgid "Cancel"
 msgstr "Cancel"
diff --git a/message.xml b/message.xml
index 14bc840..423b0c7 100644
--- a/message.xml
+++ b/message.xml
@@ -113,6 +113,9 @@ full copyright notices and license terms. -->
         <record model="ir.message" id="msg_book_btype_with_lines">
             <field name="text">The type cannot be deleted on the cash book '%(cbname)s' because it still contains %(numlines)s lines.</field>
         </record>
+        <record model="ir.message" id="msg_book_no_type_noopen">
+            <field name="text">The cash book '%(bookname)s' has no type and therefore cannot be opened.</field>
+        </record>
 
     </data>
 </tryton>
diff --git a/wizard_openline.py b/wizard_openline.py
index 2c76ea0..4aac5be 100644
--- a/wizard_openline.py
+++ b/wizard_openline.py
@@ -8,6 +8,7 @@ from trytond.pyson import PYSONEncoder
 from trytond.wizard import Wizard, StateView, StateTransition, StateAction, Button
 from trytond.i18n import gettext
 from trytond.pool import Pool
+from trytond.exceptions import UserError
 from trytond.transaction import Transaction
 
 
@@ -123,3 +124,53 @@ class OpenCashBook(Wizard):
         return 'end'
 
 # end OpenCashBook
+
+
+class OpenCashBookTree(Wizard):
+    'Open Cashbook2'
+    __name__ = 'cashbook.open_lines_tree'
+
+    start_state = 'open_'
+    open_ = StateAction('cashbook.act_line_view')
+
+    def do_open_(self, action):
+        """ open view from doubleclick
+        """
+        pool = Pool()
+        Book = pool.get('cashbook.book')
+        Configuration = pool.get('cashbook.configuration')
+
+        cfg1 = Configuration.get_singleton()
+        if cfg1 is None:
+            cfg1 = Configuration()
+            cfg1.save()
+
+        book = self.record
+        if book is None:
+            with Transaction().set_context({
+                '_check_access': True,
+                }):
+                books = Book.search([('btype', '!=', None)])
+                if len(books) > 0:
+                    book = books[0]
+        else :
+            if book.btype is None:
+                raise UserError(gettext(
+                    'cashbook.msg_book_no_type_noopen',
+                    bookname = book.rec_name,
+                    ))
+
+        action['pyson_context'] = PYSONEncoder().encode({
+            'cashbook': getattr(book, 'id', None),
+            'date_from': cfg1.date_from,
+            'date_to': cfg1.date_to,
+            'checked': cfg1.checked,
+            'done': cfg1.done,
+            })
+        action['name'] = '%(name)s: %(cashbook)s' % {
+                'name': gettext('cashbook.msg_name_cashbook'),
+                'cashbook': getattr(book, 'rec_name', '-/-'),
+            }
+        return action, {}
+
+# end OpenCashBookTree
diff --git a/wizard_openline.xml b/wizard_openline.xml
index 02678f6..05edf31 100644
--- a/wizard_openline.xml
+++ b/wizard_openline.xml
@@ -17,5 +17,18 @@ full copyright notices and license terms. -->
             <field name="wiz_name">cashbook.open_lines</field>
         </record>
 
+        <!-- open line view by double click at cashbook -->
+        <record model="ir.action.wizard" id="act_open_tree_lines">
+            <field name="name">Open Cashbook</field>
+            <field name="wiz_name">cashbook.open_lines_tree</field>
+            <field name="model">cashbook.book</field>
+        </record>
+
+        <record model="ir.action.keyword" id="act_open_tree_lines_keyword2">
+            <field name="keyword">form_action</field>
+            <field name="model">cashbook.book,-1</field>
+            <field name="action" ref="act_open_tree_lines"/>
+        </record>
+
     </data>
 </tryton>