Zero CC tileable hard cover red book, scanned and made by me. CC0
Source Sojan Janso
Background pattern originally a PNG drawn in Paint.net
Source Firkin
The file was named striped lens, but hey – Translucent Fibres works too.
Source Angelica
A seamless background pattern of dark brown wood planks.
Source V. Hartikainen
Love me some light mesh on a Monday. Sharp.
Source Wilmotte Bastien
Small dots with minor circles spread across to form a nice mosaic.
Source John Burks
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Formed by distorting the inside front cover of 'Diversæ insectarum volatilium : icones ad vivum accuratissmè depictæ per celeberrimum pictorem', Jacob Hoefnagel, 1630.
Source Firkin
Bright gray tones with a hint of some metal surface.
Source Hendrik Lammers