Clive Cussler for Kids - fantasy, fiction, beginner adventure/thriller

Clive Cussler (yes, the same one who writes adult books) - 


The Adventures of Vin Fiz - a magical plane and two kids fly across the country; good guys, bad guys, etc.


The Adventures of Hotsy Totsy - a magical boat and the two kids go on an adventure


(I am hoping he will write more of these as it is a market with a great deficiency for very early readers. I have included the label "children" as there are many 5-7 year olds who read quite well, but are not sufficiently emotionally mature to handle much of what is written for 8-12 year olds.  My 7-year old grandson LOVES them.)