I am battling through Wolf Hall at the moment, prompted by watching the generally excellent BBC TV series. Finding it slightly difficult because Mantel does not much follow writing conventions, but it's very engrossing and verisimilitudinous. That's my big word for today.
Bring Up The Bodies will be my next fiction read, so your recommendation of that book is encouraging.
Wolf Hall gives the necessary background; you need to know the background, the context, the setting, the respective relationships between the various characters - and not just the obvious ones (Henry, Catherine of Aragon, Anne Boleyn, Thomas More, and, of course, Thomas Cromwell himself), but other ones, such as Wolsey, Norfolk, Cranmer, Chapuys, Thomas Wyatt, and so on.
Having read Wolf Hall, Bring Up The Bodies makes an awful lot more sense, - you know who these people are, how they move in their world, and what their relationships with one another are (even though, these, too, are constantly changing) and it is more tightly written as well.
Actually, Wolf Hall takes a while to get into; I will admit that I found that the first fifty pages were a bit of a struggle, but then, the book seemed to get into its stride.
From a historical perspective, Mantel is meticulous, so meticulous, - she has studied the primary sources closely - that scholars of the era have come to hold her in serious respect as a fellow historian. For example, she is thanked, warmly, in the acknowledgements, by David McCullough, the most recent biographer of Cromwell.
She has already compelled scholars to revisit - not so much Thomas Cromwell's character - (although most now accept that the sixties reading of More good, Cromwell bad was far too simplistic) - but Cromwell's relationship with Wolsey as a strong influence and motivating factor on his life, and also, the fact that Cromwell treated his staff and protégés well, and they they felt both warmth for and loyalty to him, as well as Cromwell's sheer competence as an administrator and the fact that his religious beliefs might have also been a motivating factor in his life, rather than having been driven solely by ambition.