If my 10 year loved these, what else might he like?

[Curlyshabtree]

My DS 10 is an avid reader and is looking for something along the lines of the Dark Wild and House of Secrets trilogies.
He loves mystery/adventure. Any suggestions?

The Whispering Knights

Wild Hunt of Hagworthy

The Owl Service

The Snow Spider + sequels

The Dark is Rising Sequence

Maybe Abi Elphinstone - Dream Snatcher, etc.

Jenny Nimmo's Charlie Bone series and Snow Spider trilogy.

Garth Nix Keys to the Kingdom series- they're amazing!

Enid Blyton's "Barney" and "The XXX of Adventure" series' maybe.
They are a bit dated as there is no use of technology, no mobile phones or computers etc, but my littlest one loves them - we've been reading them aloud for a while, he is 11 now, we've still got about 4 to go before we finish both series, and he still enjoys them.
Skullduggery Pleasant maybe good too, or Percy Jackson.

I second The Dark is Rising books.

The Thief of Always by Clive Barker
A Wizard of Earthsea

The Polar Bear explorers club
Lemony Snicket books