Cob, built by The Cob Cottage and featured in their book 'The Hand-sculpted House: A Practical Guide to Building a Cob Cottage'	Earthbag, featured in Paulina's book 'Building with Earth: A Guide to Flexible-form Earthbag Construction'	Strawbale, built by Amazon Nails and featured in Barbara's book 'Building with Straw Bales: A Practical Guide for the UK and Ireland'	Timber frame , featured in Timber Frame Construction by Sobon & Schroeder