A mod loading error has occurred to me after downloading the EnchantmentDescriptions-Forge-1.19.4-15.0.1.jar.
I do not know, where to find/download the missing part "bookshelf 18".
I know there are a few older closed cases facing the "booksheld issue" but it didn't really helped me until now.

Thanks for an answer :)

Some more information:

-- Head --
Thread: Render thread
Stacktrace:
at net.minecraftforge.logging.CrashReportExtender.lambda$dumpModLoadingCrashReport$7(CrashReportExtender.java:61) ~[forge-1.19.4-45.0.50-universal.jar%23173!/:?] {re:classloading}
-- MOD enchdesc --
Details:
Mod File: /C:/Users/Nils/AppData/Roaming/.minecraft/mods/EnchantmentDescriptions-Forge-1.19.4-15.0.1.jar
Failure message: Mod enchdesc requires bookshelf 18 or above
Currently, bookshelf is not installed
Mod Version: 15.0.1
Mod Issue URL: https://github.com/Darkhax-Minecraft/Enchantment-Descriptions/issues
Exception message: MISSING EXCEPTION MESSAGE
Stacktrace:
at net.minecraftforge.logging.CrashReportExtender.lambda$dumpModLoadingCrashReport$7(CrashReportExtender.java:61) ~[forge-1.19.4-45.0.50-universal.jar%23173!/:?] {re:classloading}
at java.util.ArrayList.forEach(ArrayList.java:1511) ~[?:?] {}
at net.minecraftforge.logging.CrashReportExtender.dumpModLoadingCrashReport(CrashReportExtender.java:59) ~[forge-1.19.4-45.0.50-universal.jar%23173!/:?] {re:classloading}
at net.minecraftforge.client.loading.ClientModLoader.completeModLoading(ClientModLoader.java:165) ~[forge-1.19.4-45.0.50-universal.jar%23173!/:?] {re:classloading,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.lambda$new$2(Minecraft.java:591) ~[client-1.19.4-20230314.122934-srg.jar%23168!/:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.Util.m_137521_(Util.java:582) ~[client-1.19.4-20230314.122934-srg.jar%23168!/:?] {re:classloading,xf:OptiFine:default}
at net.minecraft.client.Minecraft.lambda$new$3(Minecraft.java:585) ~[client-1.19.4-20230314.122934-srg.jar%23168!/:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.client.gui.screens.LoadingOverlay.m_86412_(LoadingOverlay.java:196) ~[client-1.19.4-20230314.122934-srg.jar%23168!/:?] {re:classloading,xf:OptiFine:default}
at net.minecraft.client.renderer.GameRenderer.m_109093_(GameRenderer.java:1363) ~[client-1.19.4-20230314.122934-srg.jar%23168!/:?] {re:classloading,pl:accesstransformer:B,xf:OptiFine:default}
at net.minecraft.client.Minecraft.m_91383_(Minecraft.java:1160) ~[client-1.19.4-20230314.122934-srg.jar%23168!/:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.m_91374_(Minecraft.java:731) ~[client-1.19.4-20230314.122934-srg.jar%23168!/:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.client.main.Main.main(Main.java:205) ~[1.19.4-forge-45.0.50.jar:?] {re:classloading,pl:runtimedistcleaner:A}
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?] {}
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[?:?] {}
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?] {}
at java.lang.reflect.Method.invoke(Method.java:568) ~[?:?] {}
at net.minecraftforge.fml.loading.targets.CommonClientLaunchHandler.lambda$launchService$0(CommonClientLaunchHandler.java:27) ~[fmlloader-1.19.4-45.0.50.jar:?] {}
at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:30) ~[modlauncher-10.0.8.jar:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:53) ~[modlauncher-10.0.8.jar:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:71) ~[modlauncher-10.0.8.jar:?] {}
at cpw.mods.modlauncher.Launcher.run(Launcher.java:106) ~[modlauncher-10.0.8.jar:?] {}
at cpw.mods.modlauncher.Launcher.main(Launcher.java:77) ~[modlauncher-10.0.8.jar:?] {}
at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26) ~[modlauncher-10.0.8.jar:?] {}
at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23) ~[modlauncher-10.0.8.jar:?] {}
at cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:141) ~[bootstraplauncher-1.1.2.jar:?] {}

You can download Bookshelf from CurseForge. It's linked on the file page where you should have downloaded this mod from. This is the exact file you want for Forge 1.19.4. https://www.curseforge.com/minecraft/mc-mods/bookshelf/files/4454755

Thank you very much!