Jake, Lucus, Cyril, and Lexi are agents with Team Spy Gear.
Okay, I try to start all my entries that way even when it is only close to the truth.
First, there is no organization named 'Team Spy Gear'; these four kids are Team Spy Gear (TSR). They created the group and named it themselves and everything.
Let's meet the founding - and only - members:
Jake Bixby - 13 - average-size, average-looking with brown hair and brown eyes. The narrator says that if you look closer, you would see there was "something oddly special" about him - like there was an aura around him. Of course no one else ever saw it but the narrator just wanted to point it out so ... Anyways, one interesting point is that Jake never smiles - he grins. Seems an important point to the narrator.
Lucas Bixby - 11 - the younger of the two brothers, a skinny, black-haired kid with huge green eyes. The first thing the narrator tells about him is that he "does everything with gusto." He moves way too fast. He spills his milk daily. When he chews gum, it sounds like slime creatures attacking from everywhere. You know the type".
Cyril Wong - 13 - Jake's best friend, he is "tall, goofy, smart, gawky" with the "worst-looking hair of anyone west of the Dardanelles" and the narrator said that if you were a mean kid, you would call him a "mop-head".
Lexi Lopez - 11 - Lucas's best friend, she takes athletics to a higher level (literally since when we first meet her, she has just climbed a drainpipe into Lucas's room only to then slide down the banister). She takes ballet and gymnastics and it seems anything else that involved moving and doing stuff.
So, now that we've met them, let's go over why they are TSG. It all happened after a game Jake was in and the others came to watch at the Soccer Complex. They happened to mention the spooky set of woods that touched the area and how it got so scary and what might be in it that was so bad and it was really a bad idea to go it and check it out. So, of course, they decide to do it (except Cyril - he goes as well but he doesn't want to).
And that is when they find the building, a windowless, bunkerlike structure surrounded by a tall security fence with spirals of barbed wire strung across the top. It had a thick metal door sealed shut. It looked ominous and they would have run away from it but a sign on the door said it belonged to Stoneship Toys and was its Midwest Warehouse.
So, they knew they had to sneak a peak and they find a way in and ... they find it is chockful of awesome equipment. All sorts of stuff. Weird goggles and strange flashlights and two-way radios and on and on and most of it had cool names and instructions and naturally the quartet has to try some out.
And since all this stuff was obviously spy gear and these four were a team, that's how they got their name! Simple, right?