While it is very good based on what I've read so far I'd say no it isn't accessible. It's very indepth and heavy on the operational details (army movements, generals etc). I'd say The Western Front book by Richard Holmes I mentioned is probably more accessible. If books about WWI that aren't focused on the Western Front are ok then I'd say 'Short History of the First World War by Gary Sheffield' or 'The First World War by Hew Strachan' are good options (but Strachan has another book called First World War - Vol 1 To Arms which I'd avoid because it's like 1000 pages) .