Campbelltown and Machrihanish Light Railway, by Nigel S.C.Macmillan, Plateway Press, (1970 and) 1993, 112 pages, ISBN1 871980 178
A fascinating railway built to carry coal and passengers. The locomotives and rolling stock were of a similar quality to the L&MVLR. The line ran from seaport to seaside with a colliery part way along the line. At one end it ran down a steep gradient to a quayside and effectively became a street tramway. There are drawings, photos and maps and, at the end of the book, the 'what might have been' extensions across other parts of nearby Scotland which would make fascinating imaginary lines to the same realistic style and would have made it an extensive system in the mould of the Irish NG railways.
The Lochaber Narrow Gauge Railway, by Patrick Howat, Narrow Gauge Railway Society, 1980 (now reprinted), 72 pages, ISBN 0 9507169 0 1
Built as a steam line in 1925 to transport people, materials and equipment to the remote parts of eastern Ben Nevis area to help construct a 15 mile water tunnel and not closed until 1977. It can still be traced extensively across the moors and many of the spidery metal bridges across numerous mountain streams still exist, and some track. Lots of maps, photos and listed details of rolling stock which will allow further research elswhere for drawings. It had a variety of unusal steam, petrol and diesel motive power, including 'speeders' built from contemporary cars and lorries. This is a line with tight curves and steep gradiensts and could form the basis of a garden line where space is tight and the ground slopes.