Definitely a great fantasy epic and one of my personal favorites, The Blood Wars Trilogy-Blood Hostages, Abyssal Warriors, and Planar Powers, brings to life the story of Aereas and Nina, two cousins, and their adventures in the "multiverse" that is the World of Planescape. The books are so incredibly well written that the reader feels that they have been transported to another universe and are actually present among the characters, seeing what they see, feeling what they feel, sensing what they sense.
The author has done a FANTASTIC job of both acquiring vast knowledge relevant to the Planes as well as presenting this material efficiently and successfully! His solid grasp of factual detail makes him very capable of providing the necessary background needed to carry out the very difficult task of writing Planescape novels, which is something often missing from the work of many Fantasy authors.
JR King has truly outdone himself and has presented us with a masterpiece of literature the likes of which we have seen only in JRR Tolkien's work and in authors Margaret Weis and Tracy Hickman's Dragonlance Chronicles and Legends trilogies as well as RA Salvatore's Icewind Dale and Dark Elf Trilogies. Love, fiends, bravery, magic, swordfights and battles of epic proportion are all about. A great trilogy indeed and a "must read" along with Pages of Pain, sadly, the only other novel written in the Planescape setting.