Easy2Boot (E2B) is popular multiboot USB solution that also contains agFM and Ventoy. It supports both Legacy and UEFI.
Simply copy on your bootable ISO files to the E2B USB drive and boot! Boot to DOS, Linux, Windows Install ISOs (XP>Win11),
automate Windows installs, WIM files, VHD files, images of flash drives, Linux ISO+persistence, etc.
E2B is unique in that it uses partition images which allows you to directly boot from Secure Boot images (no need to disable Secure Boot or run MOK manager or modify your UEFI BIOS).

eBooks

The following eBooks (in PDF format) are available from the developer (rated 4.5/5 stars).

• Getting started with Ventoy
• Getting started with grub4dos – Free YouTube video course on grub4dos here
• E2B eBook #1: Getting started with E2B – How to make a multiboot USB drive using Easy2Boot
• E2B eBook #2: How to install Microsoft Windows using Easy2Boot
• E2B eBook #3: How to make a UEFI multiboot Easy2Boot USB drive
• E2B eBook #4: UEFI-multiboot using the a1ive grub2 File Manager (agFM)

Also visit Easy2Boot.xyz and the my blog – please subscribe for the latest news, tips, USB boot articles and news of free eBook updates.