Harmondsworth: Penguin, 1941. Condition is very good or better - many are fine - with only minoir spine chips here and there, except for number 11, which lacks the backstrip and has covers reattached, and number 22, which has a long partially split cover crease internally repaired with clear archival paper tape (but is otherwise nice). ; 36 of the 40 volumes issued in the series, lacking numbers 12,13,15, & 16. Numbers 1-26 are in mass market paperback format (16mo) , and nos. 27-40 are 12mos. Note: 3.6 kg parcel, extra postage will be required; 16mo 6" - 7" tall