TEE Publishing is one of the world's major sources for specialist books on all aspects of modelling including model engineering (I/C, steam and hot air), model engine history, aeromodelling, model boats, clockmaking, workshop practise and precision woodworking. The company also publishes the excellent "Engineering in Miniature" magazine for model enginers.
Regardless of your area of interest, you're sure to find a number of relevant titles among the various publications offered on TEE Publishing's website. Of particular interest to those of us interested in the history of model engine development are the facsimile editions of various classic books on model engines which have long been out of print and now generally sell for quite high prices on the collector's market. I have a number of these myself, and find them to be invaluable references in connection with my work on model engine history.
A highly recommended source for publications on all aspects of modelling!