[Albert Reiss]

Hello everybody:
I have two separate files, A and B, listed in my Documents file. I would like to join them together, B after A, so that they would act as ONE file. Both are quite long: A is 200 pages long and B is 100 pages.
Is this possible? and if yes, how?
I am a beginner so, if possible, dont drown me in technical terms!
Any help would be greatly appreciated! Thanks in advance!