The Town of Zack
Worthwhile Books - Dava Savel
The problem is the other kids at school think that Zack's town is a great idea - so great, in fact, that they want to join it!
Zack is a boy who is all-boy - and he just wants to do boy things. But Zack has three sisters - three annoying sisters - who insist on being girls, and in his room, no less! So Zack, desperate for a break, transforms the old jungle gym at school into the new Town of Zack - a place where he can finally have his own space to be who he wants to be and to do the things he wants to do.