diff --git a/lib/CollectionMembership.php b/lib/CollectionMembership.php
index 7ded2833..ce23103a 100644
--- a/lib/CollectionMembership.php
+++ b/lib/CollectionMembership.php
@@ -7,6 +7,9 @@ use function Safe\preg_replace;
 class CollectionMembership{
 	use Traits\Accessor;
 
+	public ?int $CollectionEbookId = null;
+	public ?int $EbookId = null;
+	public ?int $CollectionId = null;
 	public ?int $SequenceNumber = null;
 	protected ?Collection $_Collection = null;
 }
diff --git a/lib/Contributor.php b/lib/Contributor.php
index e6723a98..0a3b0795 100644
--- a/lib/Contributor.php
+++ b/lib/Contributor.php
@@ -1,5 +1,7 @@
 <?
 class Contributor{
+	public ?int $ContributorId = null;
+	public ?int $EbookId = null;
 	public string $Name;
 	public string $UrlName;
 	public ?string $SortName = null;
@@ -7,6 +9,7 @@ class Contributor{
 	public ?string $MarcRole = null;
 	public ?string $FullName = null;
 	public ?string $NacoafUrl = null;
+	public ?int $SortOrder = null;
 
 	public static function FromProperties(string $name, string $sortName = null, string $fullName = null, string $wikipediaUrl = null, string $marcRole = null, string $nacoafUrl = null): Contributor{
 		$instance = new Contributor();
diff --git a/lib/Ebook.php b/lib/Ebook.php
index d2d787fc..1de2a8cc 100644
--- a/lib/Ebook.php
+++ b/lib/Ebook.php
@@ -69,6 +69,8 @@ class Ebook{
 	public ?string $WikipediaUrl = null;
 	public DateTimeImmutable $EbookCreated;
 	public DateTimeImmutable $EbookUpdated;
+	public DateTimeImmutable $Created;
+	public DateTimeImmutable $Updated;
 	public ?int $TextSinglePageByteCount = null;
 	/** @var array<GitCommit> $_GitCommits */
 	protected $_GitCommits = null;
@@ -1571,12 +1573,17 @@ class Ebook{
 
 	private function InsertCollectionMemberships(): void{
 		foreach($this->CollectionMemberships as $collectionMembership){
+			$collectionMembership->EbookId = $this->EbookId;
+			$collectionMembership->CollectionId = $collectionMembership->Collection->CollectionId;
+
 			Db::Query('
 				INSERT into CollectionEbooks (EbookId, CollectionId, SequenceNumber)
 				values (?,
 					?,
 				        ?)
-			', [$this->EbookId, $collectionMembership->Collection->CollectionId, $collectionMembership->SequenceNumber]);
+			', [$collectionMembership->EbookId, $collectionMembership->CollectionId, $collectionMembership->SequenceNumber]);
+
+			$collectionMembership->CollectionEbookId = Db::GetLastInsertedId();
 		}
 	}
 
@@ -1591,13 +1598,17 @@ class Ebook{
 
 	private function InsertGitCommits(): void{
 		foreach($this->GitCommits as $commit){
+			$commit->EbookId = $this->EbookId;
+
 			Db::Query('
 				INSERT into GitCommits (EbookId, Created, Message, Hash)
 				values (?,
 					?,
 					?,
 				        ?)
-			', [$this->EbookId, $commit->Created, $commit->Message, $commit->Hash]);
+			', [$commit->EbookId, $commit->Created, $commit->Message, $commit->Hash]);
+
+			$commit->GitCommitId = Db::GetLastInsertedId();
 		}
 	}
 
@@ -1612,12 +1623,16 @@ class Ebook{
 
 	private function InsertSources(): void{
 		foreach($this->Sources as $source){
+			$source->EbookId = $this->EbookId;
+
 			Db::Query('
 				INSERT into EbookSources (EbookId, Type, Url)
 				values (?,
 					?,
 				        ?)
-			', [$this->EbookId, $source->Type->value, $source->Url]);
+			', [$source->EbookId, $source->Type->value, $source->Url]);
+
+			$source->EbookSourceId = Db::GetLastInsertedId();
 		}
 	}
 
@@ -1633,6 +1648,9 @@ class Ebook{
 	private function InsertContributors(): void{
 		$allContributors = array_merge($this->Authors, $this->Illustrators, $this->Translators, $this->Contributors);
 		foreach($allContributors as $sortOrder => $contributor){
+			$contributor->EbookId = $this->EbookId;
+			$contributor->SortOrder = $sortOrder;
+
 			Db::Query('
 				INSERT into Contributors (EbookId, Name, UrlName, SortName, WikipediaUrl, MarcRole, FullName,
 					NacoafUrl, SortOrder)
@@ -1645,9 +1663,11 @@ class Ebook{
 					?,
 					?,
 				        ?)
-			', [$this->EbookId, $contributor->Name, $contributor->UrlName, $contributor->SortName,
+			', [$contributor->EbookId, $contributor->Name, $contributor->UrlName, $contributor->SortName,
 				$contributor->WikipediaUrl, $contributor->MarcRole, $contributor->FullName,
-				$contributor->NacoafUrl, $sortOrder]);
+				$contributor->NacoafUrl, $contributor->SortOrder]);
+
+			$contributor->ContributorId = Db::GetLastInsertedId();
 		}
 	}
 
diff --git a/lib/EbookSource.php b/lib/EbookSource.php
index 6adcbd91..96ab6f5a 100644
--- a/lib/EbookSource.php
+++ b/lib/EbookSource.php
@@ -1,5 +1,7 @@
 <?
 class EbookSource{
+	public ?int $EbookSourceId = null;
+	public ?int $EbookId = null;
 	public EbookSourceType $Type;
 	public string $Url;
 
diff --git a/lib/GitCommit.php b/lib/GitCommit.php
index 7ff9dcf9..20fc9759 100644
--- a/lib/GitCommit.php
+++ b/lib/GitCommit.php
@@ -2,6 +2,8 @@
 use Safe\DateTimeImmutable;
 
 class GitCommit{
+	public ?int $GitCommitId = null;
+	public ?int $EbookId = null;
 	public DateTimeImmutable $Created;
 	public string $Message;
 	public string $Hash;
diff --git a/scripts/update-ebook-database b/scripts/update-ebook-database
index ebcad07e..7e617836 100755
--- a/scripts/update-ebook-database
+++ b/scripts/update-ebook-database
@@ -4,12 +4,18 @@ require_once('/standardebooks.org/web/lib/Core.php');
 
 use function Safe\getopt;
 
+$ignoredProperites = ['Created', 'Updated'];  // Ebooks from the filesystem don't have these DB properties set.
+
 function findObjectDifferences($fs, $db): array{
 	$diffs = [];
 	$fsReflection = new ReflectionClass($fs);
 	$dbReflection = new ReflectionClass($db);
 
 	foreach($fsReflection->getProperties() as $fsProperty){
+		if(in_array($fsProperty->getName(), $ignoredProperites)){
+			continue;
+		}
+
 		$dbProperty = $dbReflection->getProperty($fsProperty->getName());
 
 		try{