Portal Jumpers~ Book 1 (MiniCat and more)

Two police men are sent off to recover a map that was stolen from their local museum. It was stolen by three robbers for unknown reasons. No one really knew what the map was for, but many myths and tall tales were formed about it. Some say it leads to treasure beyond comprehend, some say it leads to a trap, and others believe it's fake... They're all wrong. This map leads to a kingdom in the clouds above the Bermuda Triangle. This kingdom holds something more precious than any gem or gold. This kingdom hides a portal to various different dimensions. The portal is only one of the many secrets this castle holds. It also protects a prophecy. This prophecy tells of two knights, three thieves, a sea monster, a Mage, two merchants, and a lost traveler. Centuries later, these two cops begin their quest for the map, unraveling the prophecy piece-by-piece.