-           {
-            m_ContentsBox->SetItemBold(roots[1], TRUE);
-            m_ContentsBox->SetItemImage(roots[1], IMG_Book);
-            m_ContentsBox->SetItemSelectedImage(roots[1], IMG_Book);
-            imaged[1] = TRUE;
+        {
+            // special case, only one book, make it tree's root:
+            if (booksCnt == 1)
+            {
+                roots[0] = roots[1] = m_ContentsBox->AddRoot(
+                                         it->m_Name, IMG_Book, -1,
+                                         new wxHtmlHelpTreeItemData(i));
+                imaged[0] = imaged[1] = TRUE;
+                m_ContentsBox->SetItemBold(roots[1], TRUE);
+            }
+            // multiple books:
+            else
+            {
+                if (m_hfStyle & wxHF_MERGE_BOOKS)
+                    // VS: we don't want book nodes, books' content should
+                    //    appear under tree's root. This line will create "fake"
+                    //    record about book node so that the rest of this look
+                    //    will believe there really _is_ book node and will
+                    //    behave correctly.
+                    roots[1] = roots[0];
+                else
+                {
+                    roots[1] = m_ContentsBox->AppendItem(roots[0],
+                                             it->m_Name, IMG_Book, -1, 
+                                             new wxHtmlHelpTreeItemData(i));
+                    m_ContentsBox->SetItemBold(roots[1], TRUE);
+                }
+                imaged[1] = TRUE;
+            }