I've abandoned my plans to build a steam waggon, so my research collection is for sale. Lots of specs in the two Sentinel books. Lots of great pics in the Whitehead book (back cover cellophane is damaged).
Most are ex-library and all have that old book smell (nothing offensive though and I'm picky). In good, usable shape overall.
$50 for the lot shipped in the con U.S. (only) by media mail. The second Sentinel volume was a tough one to find reasonably priced. I'll send a PayPal invoice for goods and services.
P.M. with questions.