It's not a spreadsheett, but it might be a little faster than copying it all yourself.
If you open the browser inspector, and monitor the network requests, and refresh your books likst, you can see a request to ref=myx_ajax
One of those request has the JSON message that has the documents that are showing on the screen.
Mine for example has this:
Code:
{
"OwnershipData": {
"hasMoreItems": true,
"numberOfItems": 54,
"success": true,
"items": [{
"targetDevices": {
"<snip>": 1
},
"orderId": "<snip>",
"isNellOptimized": false,
"title": "Weavers",
"sortableAuthors": "davis, aric",
"isPurchased": true,
"excludedDeviceMap": {},
"getOrderDetails": true,
"productImage": "https://images-na.ssl-images-amazon.com/images/I/51mwy3cZApL.jpg",
"acquiredDate": "June 6, 2017",
"orderDetailURL": "https://www.amazon.com/gp/digital/your-account/order-summary.html?orderID=<snip>&ref=kinw_myk_ro_details",
"isContentValid": true,
"canLoan": false,
"renderDownloadElements": true,
"acquiredTime": <snip>,
"sortableTitle": "weavers",
"originType": "Purchase",
"capabilityList": ["EBOK_PURCHASE_ALLOWED"],
"dpURL": "/gp/product/B00PJ9M834/ref=kinw_myk_ro_title",
"collectionCount": 0,
"asin": "B00PJ9M834",
"isKCRSupported": true,
"category": "KindleEBook",
"authors": "Aric Davis",
"readAlongSupport": "possible"
},
<etc>