I need any recommendations for DOS (MS-DOS) websites and books. I need to understand boot disks, etc. any help would be appreciated. thanks ahead of time.........

Ever heard of Google?

Have you tried looking at www.bootdisk.com for information about boot disks?

BTW
Welcome to TechSpot

I am pretty much a DOS expert, but that's all we had in 1984 when I started this techie journey.

I learned my stuff from a DOS tutor disk (probably no longer exists) and a book from Radio Shack (probably doesn't exist either). DOS boot disks vary depending on the version of PC-DOS or MS-DOS. DOS boot disks have usually three files on them to boot. Two hidden files (don't remember the names) and command.com. In the old days we put those files on a disk with the format a:/s command or the sys command. What do you want to do with DOS? There are many other commands: internal and external, but most people today like a graphical user interface like Windows. I am glad I learned DOS. It still comes in handy for situations like using Ghost, and other character based environments that I have to deal with from time to time.
This website looks pretty good. http://academic1.bellevue.edu/dostutor/
But there is nothing like playing with a computer and a floppy disk yourself.

From what I remember (last did this a long time ago)

98se

ASPI2DOS.SYS
ASPI4DOS.SYS
ASPI8DOS.SYS
ASPI8U2.SYS
ASPICD.SYS
AUTOEXEC.BAT
BTCDROM.SYS
BTDOSM.SYS
COMMAND.COM
CONFIG.SYS
DRVSPACE.BIN
EBD.CAB
EBD.SYS (HIDDEN)
EXTRACT.EXE
FDISK.EXE
FINDRAMD.EXE
FLASHPT.SYS
HIMEM.SYS
IP.SYS (HIDDEN)
MSDOS.SYS (HIDDEN)
OAKCDROM.SYS
RAMDRIVE.SYS
SETRAMD.BAT
README.TXT