Waiting Skeleton

SHIFTING REALITIES: THERE IS A RANDOM PORTAL THAT POPS UP ON EARTH, AND BRINGS THE VICTIMS TO AN UNKNOWN PLANET. IF THE VICTIMS TRY TO ESCAPE, THE PORTAL GRABS THEM WITH A "HAND" WITH CLAW-LIKE EXTENSIONS THE ONLY WAY TO RETURN TO EARTH IS TO OPEN A SPECIFIC RED BOOK TO PAGE 72. OPENING THE BOOK TO PAGE 72 WILL REOPEN THE PORTAL. WHAT THE CHARACTERS IN THE BOOK DON'T KNOW IS THAT THEY GAIN POWERS FROM BEING ON THAT PLANET. BY THE TIME THEY RETURN TO THE PLANET, THERE ARE NOW VILLAINS THAT ARE ON EARTH, EVEN THOUGH NO TIME HAS PASSED SINCE THEY LEFT. IN THE NEXT BOOK(THE CHOSEN'S FOREBODING), AFTER "SHIFTING REALITIES", THE CHARACTERS WILL FIND OUT ABOUT THESE SAID VILLAINS. THEY WILL HAVE TO START FIGHTING THEM ONE ON ONE MID-BOOK, BUT THEY WILL HAVE TRAINING FIRST BY THE IMMORTALS WHO CAME BACK FROM THE UNKNOWN PLANET BEFORE THEM. IN THE THIRD BOOK(SYNTHIEX), THE SECOND BOOK AFTER "SHIFTING REALITIES", THEY FIND OUT THAT THE NAME OF THE UNKNOWN PLANET IS CALLED "SYNTHIEX". THEY ALSO FIND OUT HOW THEY GOT THEIR POWERS FROM THE PLANET, AND WHY TIME ON EARTH NEVER CONTINUED WHILE THEY WERE GONE. THEY THEN MANAGE TO DEFEAT THE VILLAINS, HOWEVER MORE AND MORE START DISCOVERING HOW TO GET THROUGH THE PORTAL WITHOUT OPENING THE RED BOOK TO PAGE 72.