Maybe the Rick Brant series by John Blaine?
http://en.wikipedia.org/wiki/Rick_Brant
p.s.
Did you catch that list at the very end of that Wikipedia article on John Blaine?
Juvenile Series books (1930–1979)
Biff Brewster (1960–1965) • Brains Benton (1959–1961) • Bronc Burnett (1948–1967)
Christopher Cool (1967–1969) • Danny Dunn (1956–1977) • Chip Hilton (1948–1965)
The Hardy Boys (1927–1979) • Ken Holt (1949–1963) • Power Boys (1964-1967) • Rick Brant (1947–1968)
Tom Corbett, Space Cadet (1952–1956) • Tom Quest (1947–1955) • Tom Swift, Jr. (1954–1971)
i've never seen any of the Biff Brewster, Brains Benton, Bronc Burnett, Christopher Cool, Chip Hilton or Ken Holt books. i've seen a couple of Power Boys... & Tom Quest seems remotely familiar, but i'm not sure.
Seems like it should be *one* of those. The links are provided, there.
Cheers!
***
Addendum:
i've just sent all that you've written above to a classmate (she graduated from Clarkston High School, in Michigan, in 1960, as did i) -- became a teacher in the public schools & later a *librarian* in the public schools (& later still a hospital librarian & writer of technical medical papers & a writer for USA Today)... She's the only person *i* know of who *might* actually know. She commented, once, on our CHS Class of 1960 Yahoo list how lots of girls -- while she'd been librarian -- had loved the Nancy Drew mysteries.
i read a couple Hardy Boys books... a couple of the *original* Tom Swift books... Have actually been reading a few of the PeeWee Harris books, within the past year (& loved the Penrod series by Booth Tarkington... alongwith the Silver Chief & Black Stallion series). First half of the 60's i was in college... primarily enjoying the Cele Goldsmith AMAZING STORIES and FANTASTIC (put out by Ziff-Davis -- which IS the modified company that now operates Yahoo!, last i knew -- unless Yahoo has sold to some other corporation since i read that). 2nd half of the 60's i was mainly thrilling to IF, under the editorship of Frederik Pohl.
i think of the juvenile series books, i actually enjoyed the Judy Bolton mystery series more than any of the series written for guys! Figure that!
Now-a-years i especially enjoy J. D. Robb's Eve Dallas series.
*Maybe* my friend will know!
;)
^^^
Another Addendum:
Well, "old nuff 2 B yer grandpa" (not old enuf to be *mine*; i'm old enuf to be your elder brother!) what my friend responded probably won't be of any help to ya.
"It's been awhile since I considered children's literature, but the mystery series that were popular with my middle school students were: ENCYCLOPEDIA BROWN, HANK THE COWDOG, THE THREE INVESTIGATORS AND GOOSEBUMPS."
*
It's kinda doubtful the books you're looking for author & titles of are still on the shelves at that school library -- or any librarian *there* who would remember is still alive... but that seems to be the other option for ya, if you haven't explored it.
i assume you're wanting to re-read them because you have such fond memories of them. Certainly i've been re-reading some of the stuff i felt most *Gosh!Wow!* about in high school, like the novellas by Dwight V. Swain & Edmond Hamilton that appeared in IMAGINATIVE TALES and IMAGINATION in 1957 & 1958 -- which is when i discovered the science fiction that thrilled my 14 to 16 year old mind the *most*!
Good Luck!
& your Quest goes on!