- Click the "Books" label link on the left side of the page.
- Click the "Select All" link at the top of the list of posts.
- From the "Label Actions..." menu, choose "Remove label > Books."
- From the "Label Actions..." menu, choose "Apply label > New Label..."
- Enter "Reading" as your new label. (If you already have some posts with the label "Reading," you can simply apply that label, without making a new label.)
You do this instead ...
- Click the "Books" label link on the left side of the page.
- Click the "Select All" link at the top of the list of posts.
- From the "Label Actions..." menu, choose "Apply label > New Label..."
- Enter "Reading" as your new label. (If you already have some posts with the label "Reading," you can simply apply that label, without making a new label.)
- From the "Label Actions..." menu, choose "Remove label > Books."
This was just something that popped into my head and tested with low amount of posts. Further testing might be required. Wonder if 'Select All' would select all if there were hundreds of posts.