Guild, in modern times, is referred to as an association of people for mutual aid or the pursuit of a common goal. These guilds or of various types: craftsmen, workers, weavers etc.
In this book, there are guilds similar to those of modern times. However, these guilds consist of wizards who use magic. The sole purpose of guilds are to help normal people lead a comfortable life by accepting job requests to help them in times of need.
In the kingdom of Fiore, Fairy Tail is the most renowned guild. There is music, laughter, fun and all sorts of unruly fights, too, but life there is mundane. This guild, Fairy Tail, is headed by Master Makarov, the third guild master.
Now to the synopsis. Lucy Heartfilia is a celestial spirit wizard who has contracts with various celestial spirits, but isn't in any guild. She runs away from home to join a guild. On the way, she meets a wizard named Natsu, who possesses fire magic, and his best friend, Happy, a talking cat. When Lucy is charmed by a man named Salamander, who claims to be a member of Fairy Tail, Lucy couldn't resist accepting his invitation to attend his party. However, it turned out to be a trap. After a couple of scenes, Lucy gets to join Fairy Tail, and goes on her first job forming an alliance with Natsu, too. Frankly, I enjoyed this book thoroughly.
I first watched the anime, and am half-way through it, too, but I heard that the manga is different in a few ways, and decided to try it out. I'm glad to say that I wasn't disappointed, and Lucy simply is an intriguing character. Not to mention, Natsu's motion sickness beats the stereotype of heroes, and I found this book really compelling.