Shadow of Night, the second installment in Deborah Harkness's All Souls series, transports historian-witch Diana Bishop and vampire Matthew Clairmont to 1590s London in search of a magical manuscript. This ambitious sequel will delight readers who fell in love with the rich historical detail and supernatural romance of A Discovery of Witches, but it may frustrate those expecting the same pacing and focus.

Harkness excels at historical immersion, bringing Elizabethan England to vivid life through meticulous research. Her portrayal of figures like Christopher Marlowe and Walter Raleigh feels authentic, and the atmospheric descriptions of plague-ridden London are genuinely compelling. Diana's character development shines as she grapples with her growing magical abilities while navigating the constraints placed on women in the 16th century. The exploration of how supernatural creatures have influenced human history adds fascinating depth to the world-building.

However, the novel suffers from significant pacing issues. At over 580 pages, the middle section drags considerably, with lengthy passages devoted to daily life minutiae that don't advance the central plot. The quest for Ashmole 782 – the manuscript driving the entire series – feels frustratingly stagnant, with little meaningful progress made despite the book's length. Matthew's character becomes problematically controlling, his protective instincts crossing into possessiveness in ways that may trouble modern readers.

The romance, while passionate, is overshadowed by power imbalances that the narrative doesn't adequately address. Diana's agency is frequently undermined by Matthew's overbearing nature, creating tension that feels unintentional. The supporting cast, including the fascinating witch Goody Alsop and the mysterious School of Night members, provides welcome relief from the central relationship's intensity.

This book is perfect for readers who prioritize rich historical detail over fast-paced plotting, and who are already invested in Diana and Matthew's relationship. History buffs will appreciate the extensive research, while paranormal romance fans may find enough supernatural intrigue to overlook the pacing problems. However, readers seeking standalone satisfaction or those frustrated by controlling male love interests should skip this installment. Shadow of Night works best as a bridge novel for series devotees willing to trust Harkness's long-term vision.