I haven't read Randall's book yet, but it may be worth noting that Amazon shows 152 customer reviews and averages 4.5 stars (out of 5). Coincidentally, one of the reviews was from Lee Smolin himself who gave the book 5 stars and said why he liked it. There were several other reviews by professionals in the field, although I only read maybe 10 of the reviews. BTW, one reviewer thought the second half was better than the first, but that was just one person.
So, even if some may find it a difficult read, it may be worth slogging through it anyway. I should be getting my copy from the library in a few days but I can't guarantee how long it will take me to get through it. I need to finish Greene's book first also.
Ron