The Scottish Mountaineering Club (SMC) publish the definitive climbers’ Guides to Scotland which include both summer and winter climbs. These are listed below and can be bought from most good bookshops or direct from the SMC. Additional crags and climbs not included in the printed guides are available as free downloads from the SMC website site. See: http://www.smc.org.uk/publications/climbing for previews, downloads and to buy.
Bouldering in Scotland is developing at such a fast pace that there is a range of selected and local self-published guides available. Here is a selection of current guides, however, the best source of information for up to date info, videos, new on-line guides and topos see: https://sites.google.com/site/boulderscotland/home.
SMC Journal. Most new climbs and newly discovered crags are recorded in the SMC Journal each year. These are now available as downloads from the SMC website for the years 2003 to 2015. See: http://www.smc.org.uk/publications/downloads
There are over 70 crag topos available on the Scottish Climbs old website at: https://www.scottishclimbs.com/wiki/Guides. They cover all climbing disciplines and although some are out of date there are some gems unavailable elsewhere.