There are 2 books by C/E/H/H/S/ on BookOrb. A strong starting point is Brain Puzzlers (8-12) (2004). The bibliography below is in publication order, with series grouped in reading order.
Standalone books
Frequently asked questions
How many books has C/E/H/H/S/ written?
BookOrb lists 2 books by C/E/H/H/S/.
Where should I start with C/E/H/H/S/?
A good starting point is Brain Puzzlers (8-12) (2004).
What is the C/E/H/H/S/ books in order list?
In publication order: 1. Brain Puzzlers (8-12) (2004), 2. More Brain Puzzlers(8-12&I)*Trade (2004).