Night World, No. 1 consists of three novels: Secret Vampire, Daughters of Darkness, and Spellbinder. All these stories take place in a world where vampires, witches, werewolves, and shape-shifters live among humans and are part of a secret society called the 'Night World'. 
 "There are two cardinal rules in the Night World," he said steadily. "One is not to tell humans that it exists. The other is not to fall in love with a human. I've broken both of them." 
 The punishment for breaking a Night World law is death. 
 Unfortunately, the Night World also has the 'Soulmate Principle' which states that everyone has a soulmate who they're meant to spend the rest of their lives with. Inevitably, the Night People in Night World, No. 1 all find out that their soulmates are human. How do you maintain a relationship with a human without breaking the Night World laws? Answer: You can't. 
 Tomorrow, Poppy thought, watching the door close behind him. Tomorrow is the day I die. 
 In Secret Vampire, Poppy was diagnosed with cancer with only weeks left to live. Can you guess the best method of curing a cancer patient? Hint: the answer is in the title in the form of a best-friend/soulmate. 
 In Daughters of Darkness, Rowan, Kestrel, and Jade decide to run away from their vampire community to live with their Aunt Opal out in the country. Upon arriving at their Aunt's place, they found their Aunt's staked corpse in the cellar. 
 How do you get rid of a desiccating vampire corpse? By burying it in your backyard in the middle of the night. 
 Unfortunately for them, Mary-Lynette, Opal's neighbour, witnesses the three girls burying an Opal-sized garbage bag in their yard. So Mary-Lynette decides to investigate the matter... 
 In Spellbinder, Thea and Blaise transfer to a new school after being expelled from their previous high school for manipulating the minds of teenage boys. At their new school, Thea finds her human soulmate, but Blaise threatens to get rid of him. A magical war between Thea and Blaise ensues with terrible consequences. 
 Although the insta love/soulmate thing made me cringe a bit, I actually really enjoyed reading these stories. The romance was very sweet and innocent (appropriate for pre-teens), and the stories are pretty creative. I also liked the fact that the characters from all three books were related - I sense that there will be an uprising of sorts in the next few books where humans and Night People will work together to abolish these Night World laws.