Illustrated books can still be useful as chunky visual aids for training, and are very inexpensive if you look for them second hand.
Abebooks is the best source for finding exactly what you want – they will probably come from a bookseller in rural England or Missouri, but the postage is minimal. Here are a few finds that could liven up your food and wine training sessions:
World Atlas of Wine (several editions) – useful for the maps and pictures, and descriptions of varietals. From $5.57, including postage!
1900 Ingredients: Encyclopedia of World Foods – for when you don’t have real life examples of daikon or celeriac or mastic or honeycomb. Most of these are richly illustrated. Only $7.38 including postage.
Larousse Gastronomique – the classic French cooking text, 95% of which is never out of date. Also a good gift for an apprentice (plus a voucher for your local bookshop). From $6.69 including postage.
The Culinaria series of books on the food of Italy, Spain, France, China etc – from $7.38 including postage.
Use books for training, gifts, decoration for the bar or front of the restaurant – excellent value…