This book is an encyclopedia of all of Scotland's thousands of islands. Each island of more than 40 hectares in area - roughly 160 in total - is given its own section, with paragraphs on its history, geology, wildlife and landforms & settlements of interest; as well as a list of possible spots to land and moor a boat. This covers all those larger ones inhabited today, right down to green lumps which have never seen permanent habitation. Hundreds more even smaller islets and skerries smaller than 40 hectares are mentioned, perhaps with a separate paragraph if one harbours a notable feature - a ruined chapel or Iron Age fort maybe, or an impressive sea cave. A map of each island and its surrounding waters is provided, and Haswell-Smith's own watercolour drawings, printed in vibrant colour, are interspersed throughout the book. Locations like Skye which are connected by road to the mainland are not considered to be 'islands' by the author, but most are included in appendices anyway. Likewise for islands like Staffa or the Flannan archipelago which are smaller than 40 hectares but would have been too interesting not to include.
Each island's section follows the same structure of paragraphs; this can become repetitive but Haswell-Smith manages to keep things fresh with his lush and colourful prose. Here and there he tells of local island legends, or of a particularly characterful island local he got to know, or how he got into difficulty in a storm while navigating to a particularly remote island. Such friendly anecdotes give the book another angle: as well as functioning as an encyclopaedia it can also satisfy the armchair traveler; I read it in this capacity. I imagine it would also be of use to someone wishing to explore some of the most remote, uninhabited islets - if not to provide navigational and geographical information then to spark some ideas, at least. I believe 'island bagging' is becoming quite popular nowadays.
I particularly enjoyed Haswell-Smith's focus on the islands' toponymies. He provides translations of the names of the islands themselves, as well as the names of their landscape features: mountains, valleys, hamlets, satellite skerries. Interestingly, most of the islands' names are derived from Old Norse due to early Viking influence (with the common suffix 'ay' - in 'Berneray' for example - being transliterated from 'øy', meaning 'island') while the landforms and settlements usually have Gaelic names. Some of the translations are quite poetic, and it's nice to appreciate a multitude of rough and raw Gaelic words.
Be aware: the prime purpose of The Scottish Islands is to celebrate the smaller, often-overlooked islets. Of course, the larger, densely-populated islands are still given their own sections, but those sections are not necessarily larger in proportion to their larger land areas. For example, Mull is given nine pages, while Tanera Mór - one of the Summer Isles, less than one hundredth the area of Mull - is given three. The maps have a similar problem: those showing the smaller islands are much more detailed than those of the larger islands. The author himself writes a disclaimer about this disproportionate representation; his reasoning is that there already exist plenty of books and travel guides about the larger islands, so he prefers not to repeat information they already contain. This makes perfect sense, but reading it as an armchair traveler I was somewhat vexed by the more scanty coverage of those larger islands I myself had visited - those I had a personal connection with.
In spite of this, I still found it an enjoyable read, simultaneously satisfying my obsessions with maps, islands and mountains.