I enjoy the young adult fantasy genre — as much as any other millennial who grew up feasting on a literary diet of “Harry Potter,” “Twilight” and “The Hunger Games” — but sometimes you simply want a fantasy world to escape into that does not require a seven-book commitment. When the mood for a quick fantasy escape struck last weekend I perused my bookshelves and found my paperback copy of Rebecca Ross’ “Sisters of Sword and Song,” first published in 2020. After I read and adored the “Letters of