Make book selection persistent with signals

package-lock.json

@@ -5,6 +5,7 @@
 	"packages": {
 		"": {
 			"dependencies": {
+				"@preact/signals": "^1.3.0",
 				"preact": "^10.22.1",
 				"preact-iso": "^2.8.1"
 			},
@@ -1069,6 +1070,32 @@
 				"vite": "2.x || 3.x || 4.x || 5.x"
 			}
 		},
+		"node_modules/@preact/signals": {
+			"version": "1.3.0",
+			"resolved": "https://registry.npmjs.org/@preact/signals/-/signals-1.3.0.tgz",
+			"integrity": "sha512-EOMeg42SlLS72dhoq6Vjq08havnLseWmPQ8A0YsgIAqMgWgx7V1a39+Pxo6i7SY5NwJtH4849JogFq3M67AzWg==",
+			"license": "MIT",
+			"dependencies": {
+				"@preact/signals-core": "^1.7.0"
+			},
+			"funding": {
+				"type": "opencollective",
+				"url": "https://opencollective.com/preact"
+			},
+			"peerDependencies": {
+				"preact": "10.x"
+			}
+		},
+		"node_modules/@preact/signals-core": {
+			"version": "1.8.0",
+			"resolved": "https://registry.npmjs.org/@preact/signals-core/-/signals-core-1.8.0.tgz",
+			"integrity": "sha512-OBvUsRZqNmjzCZXWLxkZfhcgT+Fk8DDcT/8vD6a1xhDemodyy87UJRJfASMuSD8FaAIeGgGm85ydXhm7lr4fyA==",
+			"license": "MIT",
+			"funding": {
+				"type": "opencollective",
+				"url": "https://opencollective.com/preact"
+			}
+		},
 		"node_modules/@prefresh/babel-plugin": {
 			"version": "0.5.1",
 			"resolved": "https://registry.npmjs.org/@prefresh/babel-plugin/-/babel-plugin-0.5.1.tgz",