The story opens in a gripping fashion with Isles arriving back at her house after a forensic conference in France. Police cars and Rizzoli are already at her address. When Rizzoli reveals the dead woman, Isles is blown away. The woman looks just like her.

Enough to be her twin.

In fact, subsequent forensic investigation reveals that the dead woman has to be Isles’s sister. Their blood work and even their DNA matches. Isles was raised as an adopted child and had no clue that she had a blood family, much less an identical twin.

After digging into the dead woman’s background, Isles and Rizzoli discover that she -- like Isles -- was adopted. In fact, the same lawyer attended to the placement of both children.

Driven by her need to know who she really is and who her family was -- not out of curiosity, but out of self-preservation -- Isles begins the painful search for her true roots. The trail is twisted and filled with a lot of unpleasant surprises. More than that, Rizzoli becomes convinced that Isles is tracking a serial killer whose work fantasies involve killing pregnant women – which makes Rizzoli a prime target.

Body Double is a compelling experience that drags the readers through the pages at a frantic gallop. Although some of the plot at times feels familiar, Gerritsen brings so much to it that is new. This novel is definitely one of the most tense of the series and delivers a slambang ending.

Gerritsen’s newest novel, The Bone Garden, is a stand-alone and not a Rizzoli and Isles book. However, from the description it sounds like a roller-coaster ride waiting to happen. Unfortunately, fans of Rizzoli and Isles are going to have to wait at least one more year for another tale.