arthurus wrote: "I think those two, the Koran and M&H"...
By "M&H"...I'm assuming you mean .Mohammed and Charlemagne?
As for investment of time to familiarize with the list - sure it would take a very long time to absorb the entire list which I began to filter through since 2004 - a dozen years ago, so I've had plenty of time to absorb a great deal.
However, those are the books and sources which I heavily & frequently reference for reliable and accurate information. I posted the list for readers to pick and choose any one or all for a start.
I have difficulty picking just one source... the most influential sources for me were Robert Spencer, Hugh Fitzgerald, Dr. Andrew Bostom, Bat Ye'or and Dr. Bill Warner.
Emmet Scott revisits Henri Pirenne's work which confirms all these listed sources through his/their search for and analysis of physical evidence.
As I type this, I cannot resist adding an additional source:
Scott is better to read for a novice than Pirenne because Pirenne has all those “refutations” coming after. Scott disposes of the “refutations” while reiterating Pirenne’s thesis.