A good friend and mentor who has a few grey hairs carries this with him everywhere.
This contains the distilled wisdom of many years of general practice.
Saw Prof Murtagh had a similar tome from his interview with Gerry over at rural flying doc.
Many pages have fold outs with articles or further information. This portable brain is regularly updated and every few years metamorphoses to a new book dropping some bulk before growing in size again.
He is considering trying an online resource for this next edition but “might be a bit long in the tooth for that”
Anyone else seen a tome of reference or have their own?