diff --git a/extensions/notebook/src/book/bookTocManager.ts b/extensions/notebook/src/book/bookTocManager.ts
index ce0f6a3f52..8615683f43 100644
--- a/extensions/notebook/src/book/bookTocManager.ts
+++ b/extensions/notebook/src/book/bookTocManager.ts
@@ -316,7 +316,7 @@ export class BookTocManager implements IBookTocManager {
 	 * @param section The section that's been moved.
 	 * @param book The target book.
 	*/
-	async moveSectionFiles(section: BookTreeItem, book: BookTreeItem): Promise<void> {
+	async moveSectionFiles(section: BookTreeItem, bookItem: BookTreeItem): Promise<void> {
 		const uri = path.posix.join(path.posix.sep, path.relative(section.rootContentPath, section.book.contentPath));
 		let moveFile = path.join(path.parse(uri).dir, path.parse(uri).name);
 		let fileName = undefined;
@@ -349,9 +349,9 @@ export class BookTocManager implements IBookTocManager {
 			this.cleanUp(path.dirname(section.book.contentPath));
 		}
 
-		if (book.version === BookVersion.v1) {
+		if (bookItem.book.version === BookVersion.v1) {
 			// here we only convert if is v1 because we are already using the v2 notation for every book that we read.
-			this.newSection = convertTo(book.version, this.newSection);
+			this.newSection = convertTo(bookItem.book.version, this.newSection);
 		}
 	}
 
@@ -385,9 +385,9 @@ export class BookTocManager implements IBookTocManager {
 		fileName = fileName === undefined ? filePath.name : path.parse(fileName).name;
 		this.newSection.file = path.posix.join(path.posix.sep, fileName);
 		this.newSection.title = file.book.title;
-		if (book.version === BookVersion.v1) {
+		if (book.book.version === BookVersion.v1) {
 			// here we only convert if is v1 because we are already using the v2 notation for every book that we read.
-			this.newSection = convertTo(book.version, this.newSection);
+			this.newSection = convertTo(book.book.version, this.newSection);
 		}
 	}
 
diff --git a/extensions/notebook/src/book/bookTreeItem.ts b/extensions/notebook/src/book/bookTreeItem.ts
index 7b52b90b97..a2ff98d17d 100644
--- a/extensions/notebook/src/book/bookTreeItem.ts
+++ b/extensions/notebook/src/book/bookTreeItem.ts
@@ -41,7 +41,6 @@ export class BookTreeItem extends vscode.TreeItem {
 	private _uri: string | undefined;
 	private _previousUri: string;
 	private _nextUri: string;
-	public readonly version: BookVersion;
 	public command: vscode.Command;
 	public resourceUri: vscode.Uri;
 	private _rootContentPath: string;
@@ -52,7 +51,6 @@ export class BookTreeItem extends vscode.TreeItem {
 		if (book.type === BookTreeItemType.Book) {
 			this.collapsibleState = book.treeItemCollapsibleState;
 			this._sections = book.page;
-			this.version = book.version;
 			if (book.isUntitled) {
 				this.contextValue = BookTreeItemType.providedBook;
 			} else {
diff --git a/extensions/notebook/src/book/bookTreeView.ts b/extensions/notebook/src/book/bookTreeView.ts
index b85d1c3612..b555ad0c13 100644
--- a/extensions/notebook/src/book/bookTreeView.ts
+++ b/extensions/notebook/src/book/bookTreeView.ts
@@ -498,7 +498,7 @@ export class BookTreeViewProvider implements vscode.TreeDataProvider<BookTreeIte
 	public async searchJupyterBooks(treeItem?: BookTreeItem): Promise<void> {
 		let folderToSearch: string;
 		if (treeItem && treeItem.sections !== undefined) {
-			folderToSearch = treeItem.uri ? getContentPath(treeItem.version, treeItem.book.root, path.dirname(treeItem.uri)) : getContentPath(treeItem.version, treeItem.book.root, '');
+			folderToSearch = treeItem.uri ? getContentPath(treeItem.book.version, treeItem.book.root, path.dirname(treeItem.uri)) : getContentPath(treeItem.book.version, treeItem.book.root, '');
 		} else if (this.currentBook && !this.currentBook.isNotebook) {
 			folderToSearch = path.join(this.currentBook.contentFolderPath);
 		} else {
diff --git a/extensions/notebook/src/book/bookTrustManager.ts b/extensions/notebook/src/book/bookTrustManager.ts
index de24683a85..8ecb5b90f9 100644
--- a/extensions/notebook/src/book/bookTrustManager.ts
+++ b/extensions/notebook/src/book/bookTrustManager.ts
@@ -28,7 +28,7 @@ export class BookTrustManager implements IBookTrustManager {
 		let trustableBookPaths = this.getTrustableBookPaths();
 		let hasTrustedBookPath: boolean = treeBookItems
 			.filter(bookItem => trustableBookPaths.some(trustableBookPath => trustableBookPath === path.join(bookItem.book.root, path.sep)))
-			.some(bookItem => normalizedNotebookUri.startsWith(bookItem.version === BookVersion.v1 ? path.join(bookItem.book.root, 'content', path.sep) : path.join(bookItem.book.root, path.sep)));
+			.some(bookItem => normalizedNotebookUri.startsWith(bookItem.book.version === BookVersion.v1 ? path.join(bookItem.book.root, 'content', path.sep) : path.join(bookItem.book.root, path.sep)));
 		let isNotebookTrusted = hasTrustedBookPath && this.books.some(bookModel => bookModel.getNotebook(normalizedNotebookUri));
 		return isNotebookTrusted;
 	}