Architectural “puzzles” abound in Egypt, not just in the Great Pyramid but all over the plateau (and beyond). The construction of the Sarapeum (alleged “bull sarcophagi”) in the halls beneath Saqqara is another mind bender.
As an adjunct to Dr. Farell’s great Giza Death Star series, I can recommend some informative sources that are more germane to “nuts and bolts” and engineering aspects to the works of the Architects of Antiquity:
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Christopher Dunn and his books on the “Giza power plant” theory
i. my recollection is that Dr. Farrell examines Mr. Dunne’s hypothesis as part of building the case for the weaponized pyramid idea.
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Ben van Kerwyck’s “UnchartedX” work. This is not a series of books, but videos, presentations, interviews etc surveying all of the mysteries of the Architects of Antiquity, e.g. the granite tubular drill impressions, the precision construction of diverse Egyptian vases and bowls, the mystery of the unfinished obelisk etc etc. Also, the UnchartedX series covers several other ancient cultures, including the Mezo-American and South American sites where we find evidence of transport, carving, placement of massive igneous rock megaliths.
I’m sure there’s many other researchers and works of study on the Architects of Antiquity, Graham Hancock, Randall Carlson, so on and so forth, but Dr. Farrell, Cris Dunn, and UnchartedX are the core sources I’ve leaned on to build my knowledge on the subject.