Six Seasons in Sartar, for Runequest, really is an excellent quality book, and im not just talking about the bindings [which are great], but also the writing, design layout and organisation of this book.
Honestly, this is absolutely the best way to introduce a new group of players [and/or a new group of player characters] to Runquest, and especially to the world of Glorantha.
frankly this book is mesmerising. the inclusion of heroquesting themes and preludes to world changing [Glorantha] events, shown here had me, as a gm just reading through the materials, completely absorbed.
one of the best adventures i have ever read.